I. Circle the correct answer A, B, C or D to complete the sentences.

1. Duong: There’s a lot of to see – an ao dai fashion show, oriental night show and sporting activities like human chess, boat races.

Peter: …………….

A. Sound great B. Sure C. You won’t regret it D. Of course

2. Thanks to technology, we can now…………………….our culture for future generations.

A. bring B. offer C. burn D. preserve

3. He’s trying to improve his English by speaking to ……………. of English.

A. native speakers B. summer camp C. official language D. accent

4. What is the name of the most famous clock in Britain?

A. Big Clock B. Big John C. Big Apple D. Big Ben

5. What is the Symbol of New Zealand?

A. a koala B. a rooster C. a kiwi D. a bear

5. The bus for the excursion to the farm ………………. at 8.30 a.m. tomorrow.

A. leave B. leaves C. is leaving D. has left

6. We……………. Edinburgh twice, but we will be visiting it again in 2018.

A. have visited B. visited C. visit D. will visit

7. Choose the word which has a different stress pattern from the others

A. refugee B. monument B. festival D. scenery

8. The Statue of Liberty is a major monument in New York which ……….……. freedom.

A. attracts B. symbolizes C. decides D. understands

9. People from different parts of a country speak their language with different ………………. .

A. monument B. summer camp C. parade D. accent

10. David uses English as his mother……….……. because he comes from the UK.

A. nose B. cheek C. tongue D. mouth

11. A kilt is the traditional garment for ……….…….

A. Scottish men B. the Americans

C. The Aborigines in Australia D. the Maori

12. Mount Rushmore is a national …………….. carved into a mountain in USA.

A. cattle station B. parade C. monument D. loch

13. There are about 750 million English speakers in the world, and this number ……………fast

A. increases B. is increasing C. has increased D. increased

14. New Zealand ………….divided into the North Island and the South Island.

A. is B. was C. has D. will be

15. Alaska , a state in the USA, ………. both the Arctic Ocean and the Pacific Ocean.

A. faces B. face has faced D. faced

II. Complete the sentences with words/ phrases from the box.

EX a:

English-speaking countries official languages communication breakdowns

foreign language culture shocks native speakers

1. The English language has approximately 400 million ………………. worldwide.

2. Despite having two different ………………., Canada has the third largest English speaking population.

3. The United States, Australia are two ……………….

4. In Vietnam, English is now still a ………………. although many Vietnamese people can speak it.

5. People usually encounter ………………. in the first time being in a foreign country.

6. The differences in cultures and languages are the primary causes for ……………….

EX b :

1. Mount Rushmore is a national ………………………… carved into a mountain in USA.

2. Dat speaks English like a ………………………… though he comes from Viet Nam.

3. He speaks English with a strong Indian ………………………….

4. In Scotland, the word “…………………” is used to describe any large, enclosed expanse of water.

5. An ………………………… is a type of shelter built of snow by the Inuit in Canada.

6. Anna Creek Station in South Australia is the world’s largest ………………………… station with an area of 24,000 km2.

7. England is the home of ………………………… because the sport was invented there.

8. The silver fern is a national ………………………… of New Zealand.

9. I’ll never forget going to the ………………………… in Singapore last year.

10. Have you ever been to …………………………? – Yes, I went to Manchester last week.

III. Supply the correct verbs in brackets in Conditional sentences, Type 1 or2

1. If you see Mary today, please (ask)………….………….… her to call me.

2. If the air in a city……………… (get) very polluted, it can make people’s eyes burn.

3. I could understand the French teacher if she (speak)………………………..….. more slowly.

4. If people stopped using cars completely, there…………………….be) much less pollution.

5. I (accept)…………….………… if they invite me to the party.

6. If she (not be) ……………………busy, she would have come to the party.

7. Unless you all of my questions, I can’t do anything to help you.

8. If we dump all sorts of Chemicals into rivers, we………………. (not be) able to swim in them in the future.

9. Many fish wouldn’t die if factories……………………..(not dump) so many Chemicals into rivers and oceans.

10. If we all use public transport more, we………………………help) reduce air pollution.

11. I would not have get wet if I (wear) ………………………a raincoat.

12. The amount of waste …………………..(decrease) if people started to buy reusable packages.

13. If we (invite)….………………….…….. her, she could go dancing with us.

14. Many wildlife habitats will be destroyed if people…………………(keep) polluting the environment.

15. Unless they (pass)……………… their examinations, they would join the army.

16. If the milkman (come)……………, tell him to leave two pints.

17. I (call)…………………. the office if I were you.

18. What you (do)…………….. if you hear the burglar alarm?

19. If people………………….(not be) so careless, Earth wouldn’t be in danger.

20. If Tom (go)……………………to bed earlier, he would not be so tired.

21. My dog always wakes me up if he (hear) ……………………………...strange noise.

22. These plants (die) …………………………….if you do not water them regularly

IV. Complete the sentences with the appropriate present tense of the verbs in brackets

1. Alaska , a state in the USA, _____ both the Arctic Ocean and the Pacific Ocean. (face)

2. In Adelaide, south of Australia, the sun _____ until 9 p.m in summer. (not/set)

3. Although England several good football teams, it _____ the World Cup only once. (win)

4. The famous Sydney Opera House.............................as an arts centre since 1973. (serve)

5. There are about 750 million English speakers in the world, and this number…………fast. (increase)

6. The Statue of Liberty in New York is a monument which …........ freedom. (symbolise)

7. England, Scotland, Wales, and Northern Ireland together the ...................... United Kingdom. (form)

8. America....................Thanksgiving Day on the fourth Thursday of November since 1864. (celebrate)

9. New Zealand ……….……….divided into the North Island and the South Island. (be)

10. Over 670 million people have visited Disneyland since it opened in 1955, and the number …………… fast. (increase)

V. Rewrite the following sentences, using the words in brackets.

1. Water in the Cau River becomes brown and has terrible smell because the waste water is released from the paper mill in Thai Nguyen City. (so)

……………………………………………………………………………………………………………

2. Nga ate a big dinner. She had a stomachache. (since)

→…………………………………………………………………………………………………………

3. Global warming happens when there is too much carbon dioxide (CO2) in the atmosphere. (causes)

→…………………………………………………………………………………………………………

4. Because plastic bags take so long to decompose, nearly all of them still exist in the environment today. (so)

……………………………………………………………………………………………………………

5. We can’t see the stars at night. There is too much light pollution. (due to)

→…………………………………………………………………………………………………………

6. Ngoc’s mother is upset because she doesn’t tidy her room every day. (if)

→…………………………………………………………………………………………………………

7. We regret it in the future. We use too much energy now.(if)

→…………………………………………………………………………………………………………

8. People use too much herbicide to treat weeds, so water in rivers. canals, lakes are extremely polluted and has bad effects on people's health. (because)

……………………………………………………………………………………………………………

9. Household dump waste into the river. It is polluted. (so)

→…………………………………………………………………………………………………………

10. Aquatic life suffers or dies because there is thermal pollution. (because of)

……………………………………………………………………………………………………………

11. Noise pollution happens. There is a change in animals’ living pattern. (leads to)

→…………………………………………………………………………………………………………

12. There are asthma, allergies and other respiratory illnesses when air pollution happens. (leads to)

……………………………………………………………………………………………………………

13. Acid rain is dangerous. Trees’ leaves are damaged. (because of)

→…………………………………………………………………………………………………………

14. Mai is ill now, so she doesn’t participate in this useful activity. (if)

→…………………………………………………………………………………………………………

15. Earth gets warmer. The sea level rises. (If)

→…………………………………………………………………………………………………………

16. Many fish in the river die due to the increased temperature of water. (because)

……………………………………………………………………………………………………………

VI. Write the correct form of words given to complete the sentences.

(UNIT 7)

1. The ……………….. fish are floating in the water. DIE

2. Aquatic plants may die because of the ……………….. water. POLLUTE

3. ………..…… is the substance that can kill you if you drink or eat it. POISONOUS

4. ………..…… habitats have been destroyed in recent years. NATURE

5. The water is ……………….., so the fish are dead. POISON

6. The acid rain caused the ……….... to the trees in this area. DAMAGE

7. The river is ……………….., so we can’t drink water from it. CONTAMINATE

8. A number of cleaning products contain ………..…… chemicals. HARM

9. Fumes from the cars and trucks are serious air …………….... . POLLUTION

10. The……………………. of lakes, rivers, oceans or underwater causes water pollution.

CONTAMINANT

11. Are all types of pollution ……………….. to the death of humans and animals? HARM

12. The ……………………. are concerned about the oil spills in East Sea. ENVIRONMENT

13. Dumping ……………………. waste into the lakes and rivers has caused serious water pollution. INDUSTRY

14. Many people in this area have cholera because they drink ……………….. water. TREAT

15. If we use water ……………………. , more people will have fresh water. CARE

16. The polluted water results in the …………………. of many aquatic animals. DIE

17. Do storm water and the atmosphere bring non-point source ……………….. ? POLLUTE

18. Don’t use poisonous chemicals. They are………..…… to our health. HARM

19. Water pollution causes the………..…… of a lot of fish. DEAD

20. Light ………..…… makes us unable to see the stars in the sky. POLLUTANT

21. The serious ………..…… has left the river with very few fish. CONTAMINATED

22. Water pollution makes a lot of fish………..…… . DEATH

23. The acid rain has caused the great …..……….... to the environment. DAMAGED

24. An…………....…… of agrochemicals is pesticides. ILLUSTRATE

25. Noise is considered as………..……..… pollution. ENVIRONMENT

(UNIT 8)

1. Both French and English are ……………………… languages in Canada. OFFICE

2. The Gold Coast is famous for its most ……………………… theme parks in Australia. ICON

3. There are different kinds of ………………… provided throughout Disneyland. ENTERTAIN

4. Scotland is a …………………… land this is noted for its rich and interesting history. LEGEND

5. Niagara Fall, on the border of the USA and Canada, is one of the most ……………………… scenery in the world. SPECTACLE

6. There are many tourist ……………………… in London such as British Museum, London Eye and Tower of London. ATTRACT

7. The Canadians are native ……………………… of English. SPEAK

8. The silver fern is a national ……………………… of New Zealand. SYMBOLIZE

9. New Zealand is well-known for the ……………………… beauty of its mountains and forests. SCENERY

10. The Glastonbury ……………………… in England attracts thousands of people every year. FESTIVE

1. Một quả dừa nặng 2kg rơi từ trên cao 3m xuống có thực hiện công không? Nếu có thì đó là
công của lực nào? Tinh công của lực thực hiện.
2.Một ôtô chuyển động đều với lực kéo 5000N đi hết quãng đường 1440m trong thời gian 40s.
Tính công của xe thực hiện.
3. Một người công nhân dùng ròng rọc động để năng một vật lên cao 6m với lực kéo ở đầu dây tự
do là 160N. Hỏi người công nhân đó đã thực hiện một công bằng bao nhiêu? ( ĐS: 1920J)
4. Một người dùng một mặt phẳng nghiêng để kéo một vật có khối lượng 60kg lên cao 2m.
a. Nếu không có ma sát thì lực kéo là 150N. Tính chiều dài của mặt phẳng nghiêng. ( ĐS: 8m)
b. Thực tế có ma sát và lực kéo là 200N. Tính hiệu suất của mặt phẳng nghiêng? ( ĐS: 75%)

5. Một người nâng một vật năng 40kg nhờ hai ròng rọc A và B. (như hình vẽ) a. Nêu tác dụng của mỗi ròng rọc.
b. Muốn kéo vật lên cao 4m người đó phải kéo với một lực tối thiểu
bằng bao nhiêu và phải kéo một đoạn dây dài bao nhiêu? Tính công thực hiện?( ĐS: 200N, 8m, 1600J)

6. Công để kéo vật có khối lượng 100kg lên cao bằng mặt phẳng nghiêng là 3000J.
Biết hiệu suất của mặt phẳng nghiêng là 80%, chiều dài mặt phẳng nghiêng là 6m
Tính độ cao đưa vật lên , lực kéo vật và lực ma sát?
( ĐS: 2,4m ; 500N, 100N)

I. Rewrite the following sentences, using the words in brackets.

1. Water in the Cau River becomes brown and has terrible smell because the waste water is

released from the paper mill in Thai Nguyen City. (so)

→ ………………………………………………………………………………………………

2. Nga ate a big dinner. She had a stomachache. (since)

→………………………………………………………………………………………………

3. Global warming happens when there is too much carbon dioxide (CO2) in the atmosphere.

(causes)

→………………………………………………………………………………………………

4. Because plastic bags take so long to decompose, nearly all of them still exist in the

environment today. (so)

→………………………………………………………………………………………………

5. We can’t see the stars at night. There is too much light pollution. (due to)

→………………………………………………………………………………………………

6. Ngoc’s mother is upset because she doesn’t tidy her room every day. (if)

→………………………………………………………………………………………………

7. We regret it in the future. We use too much energy now. (if)

→………………………………………………………………………………………………

8. People use too much herbicide to treat weeds, so water in rivers. canals, lakes are extremely polluted and has bad effects on people's health. (because)

→………………………………………………………………………………………………

9. Household dump waste into the river. It is polluted. (so)

→………………………………………………………………………………………………

10. Aquatic life suffers or dies because there is thermal pollution. (because of)

→……………………………………………………………………………………………… 11. Noise pollution happens. There is a change in animals’ living pattern. (leads to)

→………………………………………………………………………………………………

12. There are asthma, allergies and other respiratory illnesses when air pollution happens.

(leads to)

→………………………………………………………………………………………………

13. Acid rain is dangerous. Trees’ leaves are damaged. (because of)

→………………………………………………………………………………………………

14. Mai is ill now, so she doesn’t participate in this useful activity. (if)

→………………………………………………………………………………………………

15. Earth gets warmer. The sea level rises. (If)

→……………………………...………………………………………………………………

16. Many fish in the river die due to the increased temperature of water. (because)

→………………………………………………………………………………………………

II. Rewrite the following sentences, beginning the words given.

1. You can’t have a good health unless you exercise more.

→ If …………………………………………………………………………………………….

2. Visual pollution happen when there are too many telephone poles, advertisement

billboards, or shop signs.

→ Too many…………………………………………………………………………………….

3. Unless we take action immediately, the air will become completely polluted.

→ If we………………………………………………………………………………………….

4. Herbicides kill both weeds and aquatic plants.

→ Both weeds and aquatic plants die………………………………………………………….

5. The environment is now in danger because many people do not respect it.

→ If many people……………………………………………………………………………….

6. The water is contaminated, so people get more diseases.

→ Since……………………………………………………………………………………….

7. My uncle suffered from lung cancer because he breathed in unclean air.

→ Because of………………………………………………………………………………….

8. Unless people stop throwing rubbish in the street, the street won’t look attractive.

→ The street will look………………………………………………………………………….

9. Because it rained heavily, the road in front of my house was flooded.

→ Due………………………………………………………………………………………….

10. Too much use of electric lights in cities may cause light pollution.

→ Light pollution may result ………………………………………………………………….

III. Write conditional sentence type I or II for these situations.

1. People eat dirty food. They can be cancer.

→ ……………………………………………………………………………………………..

2. A factory directly discharges a large volume of waste water into the Thi Vai River. The

river is polluted.

→ ………………………………………………………………………………………………

3. Farmers use polluted water to water their plants. People eat these plants, they become sick

with diseases such as diarrhea, bacteria inflections even cancer.

→ ………………………………………………………………………………………………

4. Thermal pollution takes place, the water temperature in streams, rivers, lakes and oceans

will increase or decrease suddenly.

→ .…………………………………………………………………………………………….

5. People live in radioactive pollution area. They can be skin cancer

→ ……………………………………………………………………………………………….

42

I. Choose the word or phrase among A, B, C or D that best fits the blank space in the following passages.

(A) Have a walk (1) a beach, listen to the sound of the sea waves, and suddenly you see a lot of rubbish on the beach. Pollution takes away all the (2) of our beaches. I feel really annoyed (3) I see plastic bags lying on the sand, cigarette ends buried in the sand, and soda cans floating in the sea.

There are a lot of things that we can do. (4)_____ we see rubbish, we should do our part in the protecting the land (5) ____________ picking it up and throwing it in dust bins. (6) _______, we can form some kind of organization that helps (7) the beaches. If everyone does their part, the beaches will be a wonderful and beautiful place. We need to start now (8) the beaches are damaged beyond repair.

1. A. on B. in C. at D. over

2. A. beauty B. beautifully C. beautiful D. being beautiful

3. A. before B. after C. when D. while

4. A. While B. Soon C. Unless D. If

5. A. by B. with C. of D. in

6. A. Nevertheless B. Moreover C. However D. Therefore

7. A. cleaning up B. cleaning up C. clean up D. clean off

8. A. when B. after C. until D. before

(B) Light pollution is not (1) serious as water or air pollution. (2) , it is the type of pollution that (3) more in cities than in rural areas. In the past, we could sit out at night and (4) at glittering stars in the sky and light from objects in the outer space. Nowadays, cities are covered with lights from buildings, streets, advertising displays, many of which direct the lights up into the sky and into many unwanted places. The real problem is that it is very (5) to apply light to almost everything at night. Millions of tons of oil and coal (6) to produce the power to light the sky. Eye strain, (7) ______ of vision and stress are what people may get from light pollution. Too much light at night can harm our eyes and also harm the hormones that help us to see things properly.

1. A. as B. more C. much D. only

2. A. Moreover B. However C. Therefore D. Nevertheless

3. A. happen B. occur C. occurs D. is occurred

4. A. watch B. see C. spend D. gaze

5. A. waste B. wasteful C. wasting D. wastes

6. A. used B. using C. is used D. are used

7. A. lose B. lost C. loss D. losing

II. Read the passage, and choose the correct answer A, B, C or D for each question.

Saving the Environment: One Home at a Time

Pollution can be seen not only throughout the world, but also in our own homes. It comes from household chemicals, the amount of water people use and the waste people produce and throw away. What can be done to stop this pollution? Surprisingly, a person can help save the environment by doing simple things.

First, we need to recycle, which allows products to be used over and over again. Recycling can also reduce the number of trees cut down to produce paper products. It takes very little effort. It is not hard to place plastic and glass bottles, aluminum cans and paper in a bin. Anyone can do it.

Second, we need to watch the amount of water used at home. It can be conserved by taking short showers instead of baths, repairing leaky faucets, using the dishwasher or washing machine only when fully loaded, or simply turning the faucet off while brushing your teeth.

Third, we need to reduce waste. We need to recycle whenever possible, but should also try to use this waste effectively. For example, grass clippings and food scraps can be made into compost for plants. The average person produces 4.3 pounds of waste every day, but we can reduce that amount by recycling and reusing.

If we do our part in our own homes, we can help keep the planet from becoming more polluted.

1. Pollution is caused from the following sources except .

A. water in rivers B. water from households

C. wastes D. house chemicals

2. Recycling can help us .

A. never cut down trees B. produce more paper products

C. place garbage bins easily D. use products again and again

3. In order to save water, we can do all of the following things except .

A. fully use the washing machine

B. repair leaky faucets

C. take short showers instead of baths

D. turn the faucet off while brushing your teeth

4. Recycling helps to reduce waste because .

A. plants need to develop

B. waste can be recycled and reused

C. a person can do it in his home

D. an average man produces compost for plants

5. The word “It” in paragraph 2 refers to .

A. cutting down B. the number

C. recycling D. effort

III. Rewrite the sentences, using the words in brackets.

1. Keep silent or you will wake the baby up. (If)

…………………………………………………………………………………………

2. She has a headache after work every day. She works in a noisy office. (If)

…………………………………………………………………………………………

3. Because it rained heavily, the road in front of my house was flooded. (due to)

…………………………………………………………………………………………….

4. Noise pollution happens. There is a change in animals’ living pattern. (causes)

………………………………………………………………………………………

41

A. MULTIPLE CHOICE

I. Circle the best answer A, B, C or D to complete each sentence.

1. Choose the word that has the underlined part pronounced differently from the others

A. buffalo B. photo C. limestone D. botanical

2. Choose the words that have the different stress from the others.

A. affect B. billboard C. visual D. substance

3. Water…………………. in the lake has made the fish die.

A. pollution B. pollute C. polluted D. polluting

4. If you can give me one good reason for your acting like this,………………………thisincident again.

A. I will never mention B. I never mention C.will I never mention D. I don’t mention

5. Unless you ……………………… all of my questions, I can’t do anything to help you.

A. answered B. answer C.would answer D. are answering

6.If someone………………into the store, smile and say, “May I help you?”

A. comes B.came C.come D. should come

7. “Here’s my phone number”.

“Thanks. I’ll give you a call if I……………………some help tomorrow”

A. will need B. need C.would need D. needed

8.If I didn’t work for an accounting firm, I…………………in a bank now.

A. work B.will work C. have worked D. would work

9.Too much use of.......................lights in cities may cause light pollution.

A. traffic B. aquatic C. sigh D. electric

10. If the factory continues ………………… poison into the lake, all the fish and other aquatic animals will die.

A. dumped B. to dump C. dump D. dumping

11.If she…………………him, she would be very happy.

A. would meet B. will meet C. met D. should meet

12. If I had enough money, I…………….abroad to improve my English.

A. will go B. would go C. went D. should have go to

13.Households dump waste ...............the river, so it is polluted

A. down B. on C. in D. into

14. Students are more aware .................protecting the environment.

A. to B. in C. of D. with

15. .......................from households is another cause leads to water pollution.

A. Sewage B. Herbicides C. radioactive D. thermal

B. WRITING

I. Rewrite the following sentences, using the words in brackets.

1. Dumping solid wastes in rivers, lakes and oceans causes water pollution. (result in)

→……………………………………………………………………………………………………………..

2. Global warming makes water temperature go up. [due to)

→Water temperature…………………………………………………………………………………….

II. Rewrite the following sentences, using conditional sentences Type 1 or 2

1.People throw rubbish in the street.The street doesn’t look attractive.

→……………………………………………………………………………………………………………..

I’ll probably get lost unless he comes with me.

→……………………………………………………………………………………………………………..

3 1

I. Choose the best answer (marked A, B, C ,D) to complete the following sentences or do as directed.

1. Do you think there would be less conflict in the world if all people ____________ the same language?

A. spoke B. speak C. had spoken D. will speak

2. If someone ___________ into our store, smile and say “May I help you?”

A. comes B. came C. will come D. should come

3. The death rate would decrease if hygienic conditions _________ improved.

A. be B. are C. were D. are being

4. If she him, she would be very happy.

A. meets B. will meet C. met D. should meet

5. Lisa ____________ the milk if she looked for it in the fridge.

A. will find B. found C. finds D. would find

8. The soil becomes ___________ because of the use of so many pesticides and fertilizers.

A. contaminate B. contaminated C. contaminant D. contamination

9. Forest fires ____________ the pollution of the air.

A. make B. result C. cause D. lead

10. The _________ are discussing solutions to the polluted atmosphere in our city.

A. pollutants B. environmentalists C. poisons D. fumes

11. She has come __________ with an idea about the environmental project.

A. up B. on C. to D. in

12. If the local people drink contaminated water, they _________ have health problems.

A. would B. should C. will D. ought to

13. Choose the word that has the underlined part pronounced differently from the others:

A. dramatic B. unable C. national D. aquatic

14. Circle a mistake in the following sentence:

Water from power stations is able to cause water in rivers hotter.

A B C D

15. _______ many households throw garbage on the ground, the land is polluted.

A. Because B. So C. Therefore D. Due to

16. Scientists sometimes can't see the stars at night __________ light pollution.

A. due to B. because C. so D. since

17. The sight of too many telephone poles, advertising billboards, overhead power lines, or shop signs may cause _________ pollution.

A. visual B. thermal C. radioactive D. soil

18. ___________ pollution occurs when the atmosphere contains gases, dust, or fumes in harmful amounts.

A. Thermal B. Air C. Radioactive D. Water

19. If people _______ rubbish on the streets, they would look attractive.

A. threw B. didn’t throw C. don’t throw D. have thrown

20. __________ pollution is the contamination of lakes, rivers, oceans, or groundwater, usually by human activities.

A. Land B. Air C. Radioactive D. Water

II/ Rewrite the sentences, using the words in brackets. You can make some changes.

1. Aquatic creatures suffer or die because there is thermal pollution. (because of)

_____________________________________________________________

2. Many people in this area had cholera due to drinking untreated water. (since)

_____________________________________________________________

3. Mr. Nam works in the noisy environment. His hearing becomes worse. (if)

_____________________________________________________________

4. Turn the heat down or your cake will burn. (if)

_____________________________________________________________

2

1. The ……………….. fish are floating in the water. DIE
2. Aquatic plants may die because of the ……………….. water. POLLUTE
3. ………..…… is the substance that can kill you if you drink or eat it. POISONOUS
4. ………..…… habitats have been destroyed in recent years. NATURE
5. The water is ……………….., so the fish are dead. POISON
6. The acid rain caused the ……….... to the trees in this area. DAMAGE
7. The river is ……………….., so we can’t drink water from it. CONTAMINATE
8. A number of cleaning products contain ………..…… chemicals. HARM
9. Fumes from the cars and trucks are serious air …………….... . POLLUTION
10. The……………………. of lakes, rivers, oceans or underwater causes water pollution.
CONTAMINANT
11. Are all types of pollution ……………….. to the death of humans and animals? HARM
12. The ……………………. are concerned about the oil spills in East Sea. ENVIRONMENT
13. Dumping ……………………. waste into the lakes and rivers has caused serious water pollution.
INDUSTRY
14. Manypeople in this area have cholera because they drink ……………….. water. TREAT
15. If we use water ……………………. , more people will have fresh water. CARE

16. The polluted water results in the …………………. of many aquatic animals. DIE
17. Do storm water and the atmosphere bring non-point source ……………….. ? POLLUT18. Don’t use poisonous chemicals. They are………..…… to our health. HARM
19. Water pollution causes the………..…… of a lot of fish. DEAD
20. Light ………..…… makes us unable to see the stars in the sky. POLLUTANT
21. The serious ………..…… has left the river with very few fish. CONTAMINATED
22. Water pollution makes a lot of fish………..…… . DEATH
23. The acid rain has caused the great …..……….... to the environment. DAMAGED
24. An…………....…… of agrochemicals is pesticides. ILLUSTRATE
25. Noise is considered as………..……..… pollution. ENVIRONMENT

giúp mik với !

Câu 13 Tập hợp tất cả các giá trị của x thỏa mãn \(x^3=-1\)laf :

A . ( 0;-1) B .(0) C.∅ D.(0;-1;1)

Câu 15: Cho ABC có MN //BC thì:

A.\(\frac{AM}{NC}\)=\(\frac{MB}{AN}\) B.\(\frac{AN}{MB}=\frac{AM}{NC}\) C.\(\frac{AM}{MB}=\frac{AM}{NC}\) D.\(\frac{MB}{MA}=\frac{NA}{NC}\)

A/ TRẮC NGHIỆM.

Khoanh tròn vào chữ cái đứng trước câu trả lời đúng:

Câu 1: Phương trình 2x – 4 = 0 tương đương với phương trình:

A. 2x + 4 = 0 B. x – 2 = 0 C. x = 4 D. 2 – 4x = 0

Câu 2: Phương trình –x + b = 0 có một nghiệm x = 1, thì b bằng:

A. 1 B. 0 C. – 1 D. 2

Câu 3: Cho đoạn thẳng AB có chiểu dài gấp 4 lần đoạn thẳng CD, độ dài đoạn thẳng CD gấp 10 lần độ dài đoạn thẳng EF. Tỉ số của hai đoạn thẳng AB và EF là:

A. B. 40 C. D.

Câu 4: Cho tam giác ABC. Lấy D, E trên các cạnh AB, AC sao cho DE // BC và AD = 8cm, DB = 6cm, AE = 10cm. Độ dài cạnh AC là:

A. 8cm B. 10cm C. 15cm D. 17,5cm

Câu 5: Một hình chữ nhật có diện tích 15m². Nếu tăng chiều dài lên hai lần, chiều rộng lên ba lần thì diện tích của hình chữ nhật mới là :

A. 30m² B. 45m² C. 90 m² D. 75 m²

Câu 6: Chọn đúng (Đ), sai (S) điền vào chỗ chấm.

a) Hai tam giác bằng nhau thì đồng dạng với nhau.....

b) Hai tam giác đồng dạng với nhau thì bằng nhau.....

Câu 7: Cho MN/PQ = 3/4 và PQ = 12cm. Độ dài của MN là:

A. 6cm B. 8cm C. 9cm D. 10cm

Câu 8: Cho tam giác ABC, vẽ MN // BC . Biết AM = 4; AN = 5, AC = 8,5.

Độ dài x của đoạn thẳng MB là:

A. x = 2,8 B. x = 2,5 C. x = 2,7 D. x = 6,8

Câu 9: Cho hình chữ nhật ABCD có AB = 12cm; BC = 18cm. Gọi M là trung điểm BC, đường thẳng AM cắt CD tại N. Độ dài MN là:

A. 10cm B. 15cm C. 17cm D. 18cm

Câu 10: Gọi M là điểm nằm trên đoạn thẳng AB sao cho MA/MB = 1/2

Khi đó MB/AB sẽ là:

A. 1/3 B. 2/3 C. ¼ D. 3/4

Câu 11: Cho biết AB/CD = 5/4 và CD = 20cm. Độ dài đoạn AB là:

A. 15cm B. 20cm C. 25cm D. 30cm

Câu 12: Chọn câu có khẳng định đúng:

Chọn cặp phương trình tương đương.

A. x = -1 và x(x + 1) = 0 B. 5x - 2 = 3x + 4 và 2x = 2

C. 5(2x + 3) = 0 và 3(2x + 3) = 0 D. x² - 4 = 0 và x = 2

Câu 13 Tập hợp tất cả các giá trị của x thỏa mãn là:

A. B. C. D.

Câu 14: Giá trị x = 2 là nghiệm của phương trình:

A. 2x + 1 = 3x - 9 C. 4 - x = 5 - 2x

B. 3x - 1 = 2x + 1 D. 7x - 3 = 4x - 6

Câu 15: Cho ABC có MN //BC thì:

A. B. C. D.

B/ TỰ LUẬN

Bài 1: Cho biểu thức

a) Tìm điều kiện của để giá trị của được xác định rồi rút gọn biểu thức

b) Tính giá trị của biểu thức tại .

c) Tìm giá trị của để giá trị của bằng .

d) Tìm giá trị của để giá trị của bằng .

Bài 2: Cho hình bình hành có đường cao vẽ từ đến cạnh bằng

a) Tính diện tích hình bình hành

b) Gọi là trung điểm của Tính diện tích tam giác

c) cắt tại Chứng minh

d) Tính diện tích tam giác

giúp mình với mình cần gấp !