All creatures neeed to eat something in order to survive. Fortunately, different species of animals have different things that they eat as food. No matter what a creature eats, the food must have enough calories in it to maintain life. Calories, or the energy stored in the food, provide the fuel which animals, including humans, need in other words enough calories, will starve and die.

            The term calorie has a scientific meaning. Calorie is a measure of an amount of energy just like pound is a measure of weight. A calorie is officially defined as the amount of energy it takes to raise the temperature of a gram of water by 1 degree Celsius, which is 1.8 degrees Fahrenheit. The terrm “ calorie” and “ Calorie” with a capital C have two different meaning to scientists. The term Calorie ( with a capital C ) means one kilocalorie, the amount of energy required to raise the temperature of one kilogram of water by one degree Celsius. A kilogram is the same as 1,000 grams and a kilocalorie is 1,000 calories. Food calories are always measured as Calories but average people don’t care much about the difference and just use the word calories.

            Food is composed of proteins, fats and carbohydrates. Nutritionists know that a gram of protein contains 4 Calories, a gram of fat has 9 Calories, and a gram of carbohydrate has 4 Calories.

            All food contain calories. When we eat something it provides energy for our bodies to use when we are active. We even need energy or calories while we are sleeping because, for example, our bodies are still breathing, our heart is pumping, and we continue to digest the food in our stomachs. If a person eats more foodand more calories than is used up by activity, the body stores the excess calories in case it might need it later when food might not be available. So a person gains weight due to the extra food and calories. Similarity, if a person consumes fewer calories than are used every day over several weeks and ismore active, that person will lose weight.

1. Calorie is a measure of ............................

A. weight                   B. distance                  C. energy                D. volume

2. Animals that do not consume enough calories over a long time .........................

A. can lose weight            B. can starve            C. can maintain life                D. can fight against starvation

3. Human use calories when .................................

A. running                 B. studying                C. sleeping              D. all of the above

4. People gain weight from ...............................

A. eating more food and calories than they use up     B. eating fewer food and calories than they use up

C. eating a lot of fat food                                            D. eating a lot of food and calories when they are active

5. You read an article in a magazine about food and nutrition that uses the term “ calories ”  What kind of calories is this article talking about ?

A. the amount of energy               B. energy            C. foods                  D. protein, fats and carbobydrates

6. All the following statements are true EXCEPT ......................

A. Eating foods that contains lots of fat cause a person to gain weight faster than eating protein

B. People normally pay less attention to the difference between “ calorie” and “ Calorie”

C. People who are more active, like playing sports or exercising, eat fewer calories

D. People still consume energy while they are sleeping.

11. (ill) ........................................... are caused either naturally or personally.

12. Family members should share (responsible) ...................................................... more fairly.

13. My parents always give me the (finance) .................................................................support.

II-Choose the word or phrase that best completes each sentence

1. Today  many serious childhood diseases ……. by early immunization.

   A. are preventing                 B. prevent                               C. can prevent             D. can  be prevented.

3. The ao dai_______ for years.  

A. is modernized                     B. have been modernized  C. was modernized           D.has been modernized

4. A new hospital___ next year.   A. is built           B. will be built              C. has been built         D. will build

5. Food______ direct to the market by trucks.   A. delivered           B. deliver       C. can be delivered     D. delivers

6. The house has___ after the fire.   A. to rebuild       B. to be rebuilt           C. be to rebuilt           D. rebuilt

7. All the homework____ at home.   A. should  do   B. should done     C. should be done        D. should be doing

8. The application form___ to the university before May 31^st. 

A. must send                 B. sent                                   C. must be send          D. must be sent

9. Traffic rules_____ strictly.     A. followed            B. must followed        C. must be followed   D. must follow

10. Students____ to participate in the after school activities.

   A. encourage                                    B. is encouraged                     C. are encouraged                   D. encouraged

12-  Let’s go and do it right now. Nothing…………. by waiting.

   A. accomplishes                   B. has accomplishes               C. will be accomplished                      D. accomplished

13-I still can’t believe it. My bicycle…..  last night.  A. was stolen     B. was stealing          C.stolen           D. stole

14-   “ When can I have my car back ?”      -  “ I think it’ll ……… late this afternoon “

   A. finish                               B. be finished                          C. be finish                              D. have  finished        

15- My uncle ………. this house in 2009 . It ……………. by a famous architect

A. was built / was desinged    B. built / was desinged           C. was built / desinged           D. builds / is designed

16- Something funny … in the class yesterday.   A. happened   B. was happened    C. is  happened  D. happening

17. A child shouldn’t …………………. everything he or she wants.

A. gives                       B. give             C. have been given                  D. be given

18-Many U.S automobiles………..   in Detroit , Michigan

  A . manufacture                    B.are  manufactured   C.  have manufactured                        D.are  manufacturing

19-  ‘ When …………………………. ? “             - “ In 1928 “

A. penicillin was discovered  B. was penicillin discovered   C. did penicillin discover  D.  did penicillin discovered

20- A new house …........... on the small slot behind my house next month.

     A . are built                        B. will be built                        C. will built                             D. was built

nguyên tử của nguyên tố X có số khối là 63.Trong nguyên tử X số hạt mang điện nhiều hơn số hạt không mang điện là 24 hạt. Tính tổng số hạt có các loại có trong 15.75g X *

A.138,46.10 mũ 23 (hạt)

B.84,98.10 mũ 22

C.307,02. 10 mũ 24

D.87,33.10 mũ 23

nguyên tử của nguyên tố X có số khối là 63.Trong nguyên tử X số hạt mang điện nhiều hơn số hạt không mang điện là 24 hạt. Tính tổng số hạt có các loại có trong 15.75g X 

Phân lớp electron ngoài cùng của hai nguyên tử A và B lần lượt là 3p và 4s. Tổng số electron của 2 phân lớp bằng 5 và hiệu số electron của chúng bằng 3. Tổng số hạt mang điện trong 2 nguyên tử A và B là *

Cấu hình e phân lớp ngoài cùng của nguyên tử của hai nguyên tố A và B lần lượt là 3s^x và 3p⁵.Biết rằng phân lớp 3s của hai nguyên tử A và B hơn kém nhau 1 electron.Hai nguyên tố A,B là gì?

I-Change the sentences into the passive voice :

1-They wrote this report last week. 

=>…………………………………………………………………………………………

2- Do millions of people watch this programme every day?

=>…………………………………………………………………………………………………………………

3- They haven’t stamped the letter yet.

=>……………………………………………………………………….…………………

4-A Japanese firm makes these television sets.

=>…………………………………………………………………………………………………..………………

5- We can’t repair your clock .

=>……………………………………………………………………….…………………

6- They didn’t pay me for the work.

 =>……………………………………………………………………..……………………

7- An earthquake destroyed the town two week ago.

=>…………………………………………….………………………………

8- Visitors must leave umbrellas and sticks in the cloakroom

=>…………………………………………………………………………………………….……………………

9- A machine could do this much more easily

=>…………………………………………………………………………………….……………………………

10- They didn’t look after the children properly

=>…………………………………………………………………………………………………………………

11- Our body cannot make essential fatty acids or vitamins, so we must obtain them through diet.

=>………………………………………………………………………………………….………………………

12. They have built three school in this city.

=>………………………………………………………………………………………….………………………

13. Have you sent my letter yet?

=>……………………………………………………………………….………………………………..………

14. Jane has studied Vietnamese since she moved here in 2006.

=>………………………………………………………………………………………….………………………

15. Have they just bought a new car?

=>…………………………… …………………………………….……………………………………………

16. They don’t speak English in this country.

=>…………………………… …………………………………….……………………………………………

17. Somebody broke into our cottage last Saturday.

=>…………………………… …………………………………….……………………………………………

18. The teacher told them a funny story.

=>…………………………… …………………………………….……………………………………………

19. The waitress brought him a big steak.

=>…………………………… …………………………………….……………………………………………

20. Did she give him a box full of chocolates last night?

=>…………………………… …………………………………….……………………………………………

Ở lớp M của nguyên tử Y có 4 electron. Số proton của Y là *