1. Janpanese ............ at the meeting A. will speak B. will spoken C. will be spoken D. will be speaking 2. The towers of the My Son sanctuary are the most significant ................ of the My Son civilization A. apartments B. plans C. structures D. arrangements 3. Ha noi’s four sacred temples, the ................ of Ha noi were built to defend the four directions of the Thang long capital city A. communication B. feelings C. energy D. spirits 4. Portuguese ................... as an official language in this city for three hundred years A. has always been spoken B. has been spoken always C. has always spoken D. had always spoken 5. The Thang Long Imperial Citadel was the ................ of political power for nearly seven centuries without interruption A. system B. centre C. middle D. point 6. ................. in simpler words A. Has this issue expressed B. Cannot issue express C. Can this issue express D. Could not this issue be expressed 7. All traffic laws ................... A. is observed B. must be observed C. must have observed D. had better observe

I. Circle A, B, C or D to choose the words with different stress
1. A. pursue B. enrol C,.equal D. repeat
2. A. lonely B. alone C. major D. famous
3. A. income B. workforce C. nature Dmature
4. A. knowledge B. challenge C .enjoy D. labor
5. A. pretty B. freedom C. happen D. begin
II. Give the correct form of the verb in brackets in the passive voice
1. A new monitor will be selected (will/select) by the members of the class next semester.
2. Information (can/find) due to the aid of the Internet.
3. If you want your car to be in good condition, it (must/service) frequently.
4. Students (not/should/give) everything about the subjects by their lecturers. They need to be creative and
discover new knowledge.
5. This house (must/sell) within 2 months.
6. When people have experienced something terrible, funny things (can/do).
7. A valid work permit (must/hold) by all employees.
8. Advice from the experts (should/take) by the government before making the new law.
9. Cultural differences (ought to/consider) by companies when engaging in business with overseas
organizations.
10. Some changes to our lives (must/ make) if we want to reduce pollution
III. Change the following sentences into passive voice.
1. You should finish the work before you leave.
_________________________________________________.
2. You can serve this wine with chicken or fish.
_________________________________________________
3.
We will elect a new government next year.
_________________________________________________
4. They might give him an award.
_________________________________________________
5. You must give students enough time to finish.
_________________________________________________.
6. You should keep flowers in a warm sunny place.
________________________________________________.
7. Nobody can solve the mystery.
__________________________________________________.
IV> Choose the best answer
1. You should ____________ attention to what your teacher is saying.
A. take B. give C. have D. pay
2. Chung Cake (square sticky rice cake), pho (rice noodles), Nem (spring rolls) are the _______food in
Vietnam.

A. Tradition B. traditional C. traditionally D. traditionalism
3. Table __________ are always paid attention to by the British.
A. Meaning B. meals C. manners D. decoration
4. Amish’s wedding __________ in the spring.
A. Take after B. take over C. take place D. take along
5. The newly-wedding couple plan to spend their ____________ in India.
A. Honeymoon B. ceremony C. bride D. groom
6. Some people think that married women ________ pursue a career.
A. shouldn’t B. might not C. mustn’t D. might not
7. We _________ stop when traffic lights are red.
A. must B. should C. might D. can
8. Remember to bring your raincoat. It ____________ rain.
A. might B. should C. can D. must
9. You ________ pick those flowers. Don’t you see the sign?
A. mustn’t B. don’t need to C. can’t D. needn’t
10 .It’s late. I think we............. better go now.
A. had B. have C. should D. would
11. We................................ take a bus to the school. It’s too far to walk.
A. have to B. must C. may D. ought
12. You................... be very tall to play football.
A. don’t have to B. mustn’t C. may not D. can’t
13. We ………… get there on time. The boss is away today.
A. mustn’t B. don’t have to C. can’t D. couldn’t
14. I _______ find my own way there. You _______ wait for me.
a. should / can't b. have to / must c. can / needn't d. might / mustn't
15. Jane gave me a letter to post. I _________ forget to post it.
A. mustn’t B. needn’t C. shouldn’t D. won’t
16. Jane gave me a letter to post. I _________ remember to post it.
A. must B. mustn’t C. can D. might
17. The picnic ________ because Peter has just had a traffic accident.
a. will cancel b. will be cancelling c. will be cancelled d. will have cancelled
18. Things ________ clear to them so that they can do the work in the way that you have told them.
a. are making b. ought to be made c. have made d. needn't be made
19. Cigarettes ________ at a bakery.
a. most buy b. cannot buy c. cannot be bought d. should not buy
29. All traffic laws ________.
a. is observed b. must be observed c. must have observed d. had better observe
21. This letter ________, not handwritten.
a. should be typing b. should be typed c. needn't type d. needn't be typed
22. Fruits ________ in a freezer.
a. should not put b. should not be put c. must put d. must be putting
23. The last decision ________.
a. will be made by the manager b. needn't be finished / will be having
c. that will be made by the manager d. must be finished / can have
24. The package ________ carefully before it ________.
a. must be wrapped / is posted b. needs wrapping / will be posted
c. should wrap / is going to be posted d. will be wrapping / needs posting
25. Shall we start working __________ our project “Equal opportunity in education?”
A. on B. out C. at D. in

Choose the appropriate options to complete the sentences.

1. Epilepsy ---- to be caused by poor air, which ---- to be carried by the veins to the brain.
is believed / thought
believes / is thought
was believed / was thought
is believing / is thinking
will be believed / has thought

2. The Wii, which is a video game console ---- by Nintendo ---- on November 19, 2006.
made / was released
is made / was released
was made / will release
makes / released
made / released

3. He ---- his first collection of poems in the early eighties and since that time he ---- by critics and public.
publishes / praised
published / has been praised
publishes / has praised
was published / was praised
will publish / will be praised

4. We can very confidently predict that if more of the forests ----, there ---- erosion
are cut / will be
cut / is
will cut / was
have been cut / used to be
was cut / will be

5. The poor bird ---- and all its efforts to escape from the trap ---- in vain.
has been captured / had been
captures / were
had been captured / was
will capture / are
had been captured / were

6. To have a clear image, stars ---- with a telescope.
must be observe
had better observe
should be observed
had to observe
could have been observed

7. It ---- that his music ---- thousands of people in the next years.
was thought / will influence
thinks / is influencing
is thought / will influence
will be thought / influences
thought / influenced

8. Archaeologists ---- today that the pyramid of an ancient Egyptian pharaoh ---- after being buried for generations.
announced / had rediscovered
announces / is rediscovered
are announced / was rediscovered
will announce / rediscovers
have announced / has been rediscovered

9. A Malawi woman who ---- with HIV five years ago ---- a baby now.
is facing / expects
is faced / was expected
was faced / is expecting
faces / expected
faced / will be expected

10. Anne Frank: The Diary of a Young Girl ---- an international bestseller that ---- into more than 50 languages.
is / has been translated
had been / is translated
is / has translated
will be / translated
was / will translate

A. needn't ​​​B. shouldn't ​​C. mustn't ​​D. can't

A. might / can ​ B. may / mustn't C. can / should D. must / needn't

A. needn't ​​​B. must ​​​c. has to ​​​D. should

A. cannot ​​​B. must not ​​C. may not ​​D. might not

A. should / can't B. have to / must C. can / needn't D. might / mustn't

A. must/ have to B. may / must ​C. should / needn't ​D. mustn't / shouldn't

A. needn't ​​​B. mustn't ​​C. do not have to ​D. may not

A. shouldn't ​​B. needn't ​​C. mustn't ​​D. oughtn't to

A. mustn't ​​B. needn't ​​C. mightn't ​​D. won't

11. We _____________ reheat the pie. We can eat it cold.
​A. needn’t​B. must​C mustn’t​D. should have

12. we _____________ forget to shut the lift gates.
​A. should​B. must​C. mustn’t ​D. needn’t

13. Some people think that married women ________ pursue a career.

​A. shouldn’t​​B. might not​​C. mustn’t​​D. might not

14. We _________ stop when traffic lights are red.​

​A. must​​B. should​​C. might​​D. can

15. Remember to bring your raincoat. It ____________ rain.

​A. might​​B. should​​C. can​​​D. must

16. You ________ pick those flowers. Don’t you see the sign?

​A. mustn’t​​B. don’t need to​C. can’t​​D. needn’t

17. It’s late. I think we............. better go now. ​​​

​A. had ​​B. have​​C. should ​​D. would

18. We................................ take a bus to the school. It’s too far to walk.

​A. have to ​​B. must ​​C. may ​​D. ought

19. You................... be very tall to play football.​​​

​A. don’t have to ​B. mustn’t ​​C. may not ​​D. can’t

20. We ………… get there on time. The boss is away today.​​

​A. mustn’t​ ​B. don’t have to​ ​C. can’t​ ​​D. couldn’t

III. Choose the word whose underlined part is pronounced differently from the others.

IV. Modal verbs in passive voice

A/Circle A, B, C or D to choose the best answer.

1. The picnic ________ because Peter has just had a traffic accident.

a. will cancel ​​b. will be cancelling ​c. will be cancelled ​d. will have cancelled

2. Everybody agrees that no more staff ________.

a. should employ ​b. should not be employed ​c. will not be employed ​d. will he employed

3. Things ________ clear to them so that they can do the work in the way that you have told them.

a. are making ​b. ought to be made ​c. have made ​d. needn't be made

4. Cigarettes ________ at a bakery.

a. most buy ​b. cannot buy ​c. cannot be bought ​d. should not buy

5. All traffic laws ________.

a. is observed b. must be observed c. must have observed d. had better observe

6. This letter ________, not handwritten.

a. should be typing ​b. should be typed ​c. needn't type d. needn't be typed

7. Fruits ________ in a freezer.

a. should not put ​ b. should not be put​ c. must put ​​d. must be putting

8. The last decision ________.

​a. will be made by the manager ​​​b. needn't be finished / will be having

​c. that will be made by the manager ​​d. must be finished / can have

9. The package ________ carefully before it ________.

​a. must be wrapped / is posted ​​​​b. needs wrapping / will be posted

​c. should wrap / is going to be posted ​​​d. will be wrapping / needs posting

10.The museum is open to everybody. It ________ between 9am and 5pm.

a. visits​​​b. visited ​​​c. can visit d. can be visited

B/Change the sentences into passive voice

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Choose the option among A, B, C, D which needs correcting to make a complete sentence

A (A) smile can be observed, described, and reliably (B) identify; it can also be elicited and manipulated under (C) experimental (D) conditions

A. smile 

B. identify

C. experimental 

D. conditions

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hyphthesis is a leap into the unknown.It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hyphthesis is a leap into the unknown.It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

In the last paragraph, what does the author imply is a major function of hypotheses ?

A. Linking together different theories

B. Communicating a scientist's thoughts to others

C. Providing direction for scientific research

D. Sifting through known facts

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hyphthesis is a leap into the unknown.It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hyphthesis is a leap into the unknown.It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

In the fourth paragraph, the author implies that imagination is most important to scientists when they x

A. formulate possible solutions to a problem

B. evaluate previous work on a problem

C. close an investigation

D. gather known facts

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hyphthesis is a leap into the unknown.It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hyphthesis is a leap into the unknown.It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

According to the second paragraph, a useful theory is one that helps scientists to x

A. observe events

B. publicize new findings

C. make predictions

D. find errors in past experiments

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hyphthesis is a leap into the unknown.It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hyphthesis is a leap into the unknown.It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

The word "supported" in paragraph 2 is closest in meaning to x

A. upheld

B. finished

C. adjusted

D. investigated

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hyphthesis is a leap into the unknown.It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions

In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

A useful theory, in addition to explaining past observation, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hyphthesis is a leap into the unknown.It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

“Bricks” are mentioned in paragraph 3 to indicate how x

A. science is more than a collection of facts

B. scientific experiments have led to improved technology

C. mathematicians approach science

D. building a house is like performing experiments