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11. Cuc Phuong National Park __________ over 200 square kilometers of rainforest.

A. contains B. gets C. hold D. covers

12. An interesting ______of this park is Orphanage, where orphaned animals are taken care of.

A. advantage B.feature C.area D.zone

13. A child who has lost one or both of his parents by death is called ________ child.

A. an abandoned B. an orphan C. a homeless D.orphanage

14.The _________ has threatened many of animals in this park.

A.rainforest B. population C. increase D.contamination

15. They went camping in the beautiful _________ of the rainforest.

A.wildlife B. wildness C.wild D.wilderness

16. This park was _________ before World War II

A. set B. located C. established D. stationed

17. We were very _________at his success.

A. surprised B.interested C.keen D.fond

18. One species is dependent __________ another of survival.

A. on B. to C. of D.at

19. My home village is ____________ 40 kilometers north of the capital..

A. located B. held C. laid D. surrounded

20. The cattle drank from a river polluted with toxic chemicals..

A.waste B. colorless C. odorless D. poisonous

21. We _________ to the beach yesterday if the sun had been shining.

A.will go B.would go C.would have gone D. had gone

22. If he _________ up earlier, he ________ to work on time.

A. got/ would get B. had got / would get

C. would get/ got D. would have got / had got

23. We wouldn’t have been to the cinema_________we hadn’t had ticket.

A. if B. unless C. because of D. in spite of

24. What ________ if you had met him yesterday?

A. did you do B. would you do C. would you have done D. will you do

25. They _________ the farm if they _________ enough money.

A. had enlarged/ would have had B. would enlarge/ had had

C. enlarged/ would have D. would have enlarged/ had had

Choose the underlined part (A,B,C or D) that needs correcting.

26. He wouldn’t have known the news if you had told him.

A B C D

27. I had gone to see you if I’d known what you were ill.

A B C D

28. My brother would buy a sports car if he don’t have the money.

A B C D

29. If I have free time next Sunday, I would visit my grandmother.

A B C D

30. If I were you, I would have forgotten about buying a new car.

A B C D

Choose one sentence that best rewrites the root one.

31. He didn’t work hard, so he failed the exam.

A. If he worked hard, he wouldn’t fail the exam.

B. If he hadn’t worked hard, he would have failed the exam.

C. He would have passed the exam if he had worked hard.

D. He had passed the exam if he would have worked hard.

32. I was tired because I stayed up late last night.

A. If I hadn’t stayed up late at night, I wouldn’t have been tired.

B. I hadn’t been tired if I wouldn’t have stayed up lat.

C. If I had stayed up late at night, I would have been tired.

D. I wouldn’t be tired If I didn’t stay up late at night.

33. The shirt didn’t fit me so I didn’t buy it.

A. If the shirt fit me, I will buy it.

B. If the shirt fitted me, I would buy it.

C. If the shirt had fitted me, I would have bought it.

D. I didn’t buy the shirt due to it didn’t fit me.

34. He didn’t know French so he didn’t go to Paris for his holiday.

A. Unless he knew French, he wouldn’t go to Paris for his holiday.

B. If he knew French, he would have gone to Paris for his holiday.

C. If he had gone to Paris, he would have known French.

D. Had he known French, he would have gone to Paris for his holiday.

35. He worked lazily so he was sacked.

A. If he hadn’t worked lazily, he wouldn’t have been sacked.

B. If he worked lazily, he would be sacked.

C. Unless he had worked lazily, he would have been sacked.

D. If he hadn’t worked lazily, he would have been sacked.

36. He didn’t take any medicine so he feels worse now.

A. If he had taken the medicine, he would have felt better now.

B. If he had taken the medicine, he would feel better now.

C. If he took the medicine, he would feel better now.

D. Unless he took the medicine, he wouldn’t feel better now

37. We want to buy that house but we don’t have enough money.

A. Unless we have enough money, we won’t buy that house.

B. We would have bought that house if we had had enough money.

C. If we had enough money, we would have bought that house.

D. If we had enough money, we would buy that house.

38. They couldn’t go home because it stormed terribly.

A. If it hadn’t stormed terribly, they could have gone home.

B. If it didn’t storm terribly, they would go home.

C. It stormed terribly so that they couldn’t go home

D. They couldn’t go home due to terribly storm.

39. Without Jack’s help, I wouldn’t have been able to move the table.

A. Jack hadn’t helped, but I could move the table.

B. Jack didn’t help, so I hadn’t been able to move the table.

C. If Jack hadn’t helped, I wouldn’t have been able to move the table.

D. Had Jack helped, I wouldn’t have been able to move the table.

40. You wouldn’t have made many mistakes if you had been careful.

A. You didn’t make many mistakes because you weren’t careful.

B. You made many mistakes because you were careful.

C. You were careful, so you didn’t make many mistakes.

D.You weren’t careful, so you made many mistakes.

Read the following passage and choose best answer ( A,B,C or D ) for each blank.

The ostrich is the (41) _______ bird in the world, and an adult can be more than ninety kilos. Most wild ostriches live in southern Africa, but there are only a (42)_________of them left. Like all birds, ostriches have wings, (43)________ they cannot fly. They use their wings to help them (44)_________when they are running. Ostriches can run very fast , from sixty-five to ninety kilometers an hour, so it is very difficult for (45)_________ animals to catch them.

41. A. large B. larger C. largest D. most largest

42. A.few B. little C. lot D. many

43. A. or B. and C. but D. except

44. A. direct B. change C. alter D. turn

45. A. another B. other C. others D. one other

Read the passage below and choose one best answer for each question.

Parks in our country are wonderful playgrounds and millions of people visit them every year. There

are places where you can camp without charge or you can rent rooms in a hotel. You can take a long walk in the forests, take boat trips, or climb mountains. You are not allowed to hunt in the park, so there are many wild animals. You can fish in the streams of most of the parks. The park keepers sometimes go with the visitors on walks to tell them about the animals, plants, and mountains. They also have programmes and talks at the campgrounds and in the hotels so that people can learn all about the park and the things that are in it.

46. We can camp in the parks _____________.

A. without having to pay anything B. with a small fee

C. if we rent a room in a hotel D. if we visit them every year

47. Which of the following activities is not mentioned in the passage?

A. go for a walk B. go climbing

C. go skiing D. go by boat

48. The word “ streams ” in line 4 is closest in meaning to ______________.

A. small rivers B. ponds C. lakes D. big sea

49. The word “ them ” in line 5 refers to ______________.

A. parks B. visitors

C. park keepers D. animals

50. Which of the following statements is NOT true?

A. There are many animals in the parks.

B. We can walk and have talks with the park keepers.

C. We are allowed to fish in most of the parks.

D. We can hunt in the parks.

1

11. Cuc Phuong National Park __________ over 200 square kilometers of rainforest.

A. contains B. gets C. hold D. covers

12. An interesting ______of this park is Orphanage, where orphaned animals are taken care of.

A. advantage B.feature C.area D.zone

13. A child who has lost one or both of his parents by death is called ________ child.

A. an abandoned B. an orphan C. a homeless D.orphanage

14.The _________ has threatened many of animals in this park.

A.rainforest B. population C. increase D.contamination

15. They went camping in the beautiful _________ of the rainforest.

A.wildlife B. wildness C.wild D.wilderness

16. This park was _________ before World War II

A. set B. located C. established D. stationed

17. We were very _________at his success.

A. surprised B.interested C.keen D.fond

18. One species is dependent __________ another of survival.

A. on B. to C. of D.at

19. My home village is ____________ 40 kilometers north of the capital..

A. located B. held C. laid D. surrounded

20. The cattle drank from a river polluted with toxic chemicals..

A.waste B. colorless C. odorless D. poisonous

21. We _________ to the beach yesterday if the sun had been shining.

A.will go B.would go C.would have gone D. had gone

22. If he _________ up earlier, he ________ to work on time.

A. got/ would get B. had got / would get

C. would get/ got D. would have got / had got

23. We wouldn’t have been to the cinema_________we hadn’t had ticket.

A. if B. unless C. because of D. in spite of

24. What ________ if you had met him yesterday?

A. did you do B. would you do C. would you have done D. will you do

25. They _________ the farm if they _________ enough money.

A. had enlarged/ would have had B. would enlarge/ had had

C. enlarged/ would have D. would have enlarged/ had had

Choose the underlined part (A,B,C or D) that needs correcting.

26. He wouldn’t have known the news if you had => hadn't told him.

27. I had gone => would have gone to see you if I’d known what you were ill.

28. My brother would buy a sports car if he don’t have => had the money.

29. If I have free time next Sunday, I would = > will visit my grandmother.

30. If I were you, I would have forgotten => would forget about buying a new car.

Choose one sentence that best rewrites the root one.

31. He didn’t work hard, so he failed the exam.

A. If he worked hard, he wouldn’t fail the exam.

B. If he hadn’t worked hard, he would have failed the exam.

C. He would have passed the exam if he had worked hard.

D. He had passed the exam if he would have worked hard.

32. I was tired because I stayed up late last night.

A. If I hadn’t stayed up late at night, I wouldn’t have been tired.

B. I hadn’t been tired if I wouldn’t have stayed up lat.

C. If I had stayed up late at night, I would have been tired.

D. I wouldn’t be tired If I didn’t stay up late at night.

33. The shirt didn’t fit me so I didn’t buy it.

A. If the shirt fit me, I will buy it.

B. If the shirt fitted me, I would buy it.

C. If the shirt had fitted me, I would have bought it.

D. I didn’t buy the shirt due to it didn’t fit me.

34. He didn’t know French so he didn’t go to Paris for his holiday.

A. Unless he knew French, he wouldn’t go to Paris for his holiday.

B. If he knew French, he would have gone to Paris for his holiday.

C. If he had gone to Paris, he would have known French.

D. Had he known French, he would have gone to Paris for his holiday.

35. He worked lazily so he was sacked.

A. If he hadn’t worked lazily, he wouldn’t have been sacked.

B. If he worked lazily, he would be sacked.

C. Unless he had worked lazily, he would have been sacked.

D. If he hadn’t worked lazily, he would have been sacked.

36. He didn’t take any medicine so he feels worse now.

A. If he had taken the medicine, he would have felt better now.

B. If he had taken the medicine, he would feel better now.

C. If he took the medicine, he would feel better now.

D. Unless he took the medicine, he wouldn’t feel better now

37. We want to buy that house but we don’t have enough money.

A. Unless we have enough money, we won’t buy that house.

B. We would have bought that house if we had had enough money.

C. If we had enough money, we would have bought that house.

D. If we had enough money, we would buy that house.

38. They couldn’t go home because it stormed terribly.

A. If it hadn’t stormed terribly, they could have gone home.

B. If it didn’t storm terribly, they would go home.

C. It stormed terribly so that they couldn’t go home

D. They couldn’t go home due to terribly storm.

39. Without Jack’s help, I wouldn’t have been able to move the table.

A. Jack hadn’t helped, but I could move the table.

B. Jack didn’t help, so I hadn’t been able to move the table.

C. If Jack hadn’t helped, I wouldn’t have been able to move the table.

D. Had Jack helped, I wouldn’t have been able to move the table.

40. You wouldn’t have made many mistakes if you had been careful.

A. You didn’t make many mistakes because you weren’t careful.

B. You made many mistakes because you were careful.

C. You were careful, so you didn’t make many mistakes.

D.You weren’t careful, so you made many mistakes.

Read the following passage and choose best answer ( A,B,C or D ) for each blank.

The ostrich is the (41) _______ bird in the world, and an adult can be more than ninety kilos. Most wild ostriches live in southern Africa, but there are only a (42)_________of them left. Like all birds, ostriches have wings, (43)________ they cannot fly. They use their wings to help them (44)_________when they are running. Ostriches can run very fast , from sixty-five to ninety kilometers an hour, so it is very difficult for (45)_________ animals to catch them.

41. A. large B. larger C. largest D. most largest

42. A.few B. little C. lot D. many

43. A. or B. and C. but D. except

44. A. direct B. change C. alter D. turn

45. A. another B. other C. others D. one other

Read the passage below and choose one best answer for each question.

Parks in our country are wonderful playgrounds and millions of people visit them every year. There are places where you can camp without charge or you can rent rooms in a hotel. You can take a long walk in the forests, take boat trips, or climb mountains. You are not allowed to hunt in the park, so there are many wild animals. You can fish in the streams of most of the parks. The park keepers sometimes go with the visitors on walks to tell them about the animals, plants, and mountains. They also have programmes and talks at the campgrounds and in the hotels so that people can learn all about the park and the things that are in it.

46. We can camp in the parks _____________.

A. without having to pay anything B. with a small fee

C. if we rent a room in a hotel D. if we visit them every year

47. Which of the following activities is not mentioned in the passage?

A. go for a walk B. go climbing

C. go skiing D. go by boat

48. The word “ streams ” in line 4 is closest in meaning to ______________.

A. small rivers B. ponds C. lakes D. big sea

49. The word “ them ” in line 5 refers to ______________.

A. parks B. visitors

C. park keepers D. animals

50. Which of the following statements is NOT true?

A. There are many animals in the parks.

B. We can walk and have talks with the park keepers.

C. We are allowed to fish in most of the parks.

D. We can hunt in the parks.

#trannguyenbaoquyen

27 tháng 3 2021

A child who has lost one or both of his parents by death is called.... child A an abandoned B an orphan C a homeless D an orphanage

27 tháng 3 2021

A child who has lost one or both of his parents by death is called.... child A an abandoned B an orphan C a homeless D an orphanage

 

16. The cinema changed completely at end of 1920s. A. the - Ø B. Ø - the C. the the D. an the 17. We stayed in Asia Hotel, . Mr. Thanh recommended to us. A. who B. that C. which/ that D. which 18. Cuc Phuong National Park .. over 200 square kms of rainforest. A. contains B. covers C. gets D. holds 19. A: is it from here to the theatre? B: About 5 kilometers A. How long B. How often C. How D. How far 20. I couldnt sleep ... very tired. A. although I was B. despite I was C. in...
Đọc tiếp

16. The cinema changed completely at end of 1920s.

A. the - Ø B. Ø - the C. the the D. an the

17. We stayed in Asia Hotel, . Mr. Thanh recommended to us.

A. who B. that C. which/ that D. which

18. Cuc Phuong National Park .. over 200 square kms of rainforest.

A. contains B. covers C. gets D. holds

19. A: is it from here to the theatre? B: About 5 kilometers

A. How long B. How often C. How D. How far

20. I couldnt sleep ... very tired.

A. although I was B. despite I was C. in spite of D. despite of being

21. .is the traditional music of a country.

A. Classical music B. Folk music C. Jazz D. Pop music

22. It was not until I was 15 years old ... I learned how to ride a bicycle.

A. whom B. who C. which D. that

23. My village is located . the northern part of the city.

A. at B. in C. of D. on

24. The Spy Returns is a very ... film about a wealthy man who visits Italy.

A. exciting B. excitement C. excite D. excited

25. Trees and shrubs .. an important part in preserving land.

A. make B. play C. keep D. have

Giúp mk vs

1
2 tháng 5 2020

16. The cinema changed completely at end of 1920s.

A. the - Ø B. Ø - the C. the the D. an the

17. We stayed in Asia Hotel, . Mr. Thanh recommended to us.

A. who B. that C. which/ that D. which

18. Cuc Phuong National Park .. over 200 square kms of rainforest.

A. contains B. covers C. gets D. holds

19. A: is it from here to the theatre? B: About 5 kilometers

A. How long B. How often C. How D. How far

20. I couldnt sleep ... very tired.

A. although I was B. despite I was C. in spite of D. despite of being

21. .is the traditional music of a country.

A. Classical music B. Folk music C. Jazz D. Pop music

22. It was not until I was 15 years old ... I learned how to ride a bicycle.

A. whom B. who C. which D. that

23. My village is located . the northern part of the city.

A. at B. in C. of D. on

24. The Spy Returns is a very ... film about a wealthy man who visits Italy.

A. exciting B. excitement C. excite D. excited

25. Trees and shrubs .. an important part in preserving land.

A. make B. play C. keep D. have

12. They are those that live on or depend on the bottom like the starfish, those that move ________ of water currents and those that are carried along by the currents. A. independence​B. independent​C. independently​D. dependent 13. Some marine animals are _________ to humans. A. danger​​B. dangerous​​C. endangered​​D. dangerously 14. You may be surprised at the large ----------- of animals that live in the sea. A. variety ​B. variously ​ ...
Đọc tiếp

12. They are those that live on or depend on the bottom like the starfish, those that move ________ of water currents and those that are carried along by the currents.

A. independence​B. independent​C. independently​D. dependent

13. Some marine animals are _________ to humans.

A. danger​​B. dangerous​​C. endangered​​D. dangerously

14. You may be surprised at the large ----------- of animals that live in the sea.

A. variety ​B. variously ​ ​C. various D. vary

15. Community police have made a very positive ______ to crime prevention.

A. contribute​​B. contributive​​C. contribution​D. contributively

16. They are investigating the ______ disappearance of a young woman.

A. mystery​​B. mysterious​​C. mysteriously​D. mysteries

17. By the age of eighteen he was completely ______ of his parents.

A. dependence​​B. dependently​C. dependent​​D. depend​

18. The ______ of the seabed is being carried out.

A. investigate​B. investigative​C. investigation​D. investigating

19.For centuries, people have been challenged by the ___________ that lie beneath the ocean.

A. mystery​​B. mysterious​​C. mysteriously​D. mysteries

20.Dolphin population is at stake due to the _______of their habitats and accidental entrapment in fishing nets.

A. pollute​​B. pollutive​​C. pollution​​D. pollutants​

21. Nairobi National Park is Kenya’s smallest park, but you may be surprised at the large ______ of animals that live there.

A. vary​B. variety​C. various​D. variously

22. Visitors, especially children, can go to Cuc Phuong National Park to learn how to recognize the ---------species of animals and plants.

A. differ​​B. difference​​C. different​D. differently

23. This national park is _____ because it has plants and animals from both tropical and temperate zones.

A. specially B. special B. specialize D. specialization

24. The giant panda is in danger of becoming extinct. It is an -------species.

A. dangerous​​B. dangerously C. endanger ​D. endangered

25. Trees, grasses, and other plant life play an important part in the _______ circulation of water.

A. natural ​​B. nature​​C. naturally​​D. naturalize

26. Without plants, most water would run off as soon as it falls, taking away ______ soil.

A. value​​B. valuable​​C. valuably​​D. values

27. The earth is being threatened and the future looks _______.

A. bad​​​B. badly​​​C. badness​​D. worsen

28. Man is _______ doing harm to the environment.

A. constancy​​B. constant​​C. constantly​​D. constants​

29. A campfire near a heap of leaves may _____ cause a forest fire.

A. ease​​​B. easy​​​C. easily​​D. eases

30. A gulf is a term that refers to the ________ of different kinds of animals and plants which make a balanced environment.

A. exist​​​B. existence​​C. existent​D. existed

0
9 tháng 4 2019

Đáp án: D

Choose the word whose underlined part has a different pronunciation from the others in each group: 1. A. national B. plan C. establish D. that 2. A. parks B. trees C. caves D. contains 3. A. found B. south C. mountain D. wound 4. A. located B. formed C. threatened D. agreed 5. A. season B. feature C. increase D. meant Choose the...
Đọc tiếp

Choose the word whose underlined part has a different pronunciation from the others in each group:

1. A. national B. plan C. establish D. that

2. A. parks B. trees C. caves D. contains

3. A. found B. south C. mountain D. wound

4. A. located B. formed C. threatened D. agreed

5. A. season B. feature C. increase D. meant

Choose the word whose main stress is placed differently from the others in each group:

6. A. establish B. visitor C. especial D. expensive

7. A. contain B. increase C. explain D. faster

8. A. rainforest B. wilderness C. tropical D. survival

MULTIPLE CHOICE

Choose the best answer A, B, C or D for each sentence:

9. The world's first national park, Yellowstone National Park, was__________ in the United States in 1872.

A. made B. done C. set D. established

10. People have always been attracted by the dedicate, gorgeously colored wings of _________

A. butterflies B. bees C. grasshoppers D. wasps

11.Hunting wildlife for meat and burning forests for soil_________ of many species.

A. protect B. conserve C. destroy D. safeguard

12. The size of the park is ___________ on the number of animals and plants

A. dependent C. depending B. dependable D. depended

13. The area has changed so much that I cannot_________ it.

A. realize B. recognize C. see D. encounter

14. They went camping in the beautiful __________ of the rainforest.

A. wildlife B. wildness C. wilderness D. wilding

15. It is a good idea to make a television_________ on the park's ten-year development.

A. document B. documentary C. documentation D. station

16. Parks help maintain a healthy balance among species and help____________ the natural processes that support life on the earth.

A. keep B. hold C. contain D. preserve

17.Many communities are using garbage and biological waste products to produce _________ .

A. electric B.electricity C. biogas D. water

18.Birds are the ____________ enemies of many pests.

A. nature B. natural C. environment D. environmental

19.The fight against ____________ of our environment is important as well.

A. pollution B. the pollution C. polluting D. the polluting

20. Natural resources should be safeguarded and preserved__________ they can

continue to be used and enjoyed.

A. because B. since C. therefore D. so that

21. We would have arrived at the party in time if you _______ so long in the café.

A. didn't spend B. hadn't spent C. wouldn't have spent D. wouldn't spend

22.If you ____________to lock the car door, it wouldn't have been stolen.

A. remembered B. had remembered

C. would remember D. would have remembered

23. Many countries use the term ___________ for areas similar to national parks.

A. wildlife reserve B. nature region

C. life area D. wild life area

24. National parks help save ___________animals and plants, and they provide natural laboratories for scientists.

A. dangerous B. danger C. endangered D. endangering

Select the synonym of the following bold and underlined word in each sentence

25. This contamination has threatened the park and many of the animals in it.

A. dirt B. dust C. pollution D. ugliness

26. This contamination has threatened the park and many of the animals in it.

A. killed B. endangered C. kicked D. weakened

27. Cuc Phuong national park is established in 1962

A. founded B. opened C. known D. closed

Choose a letter A, B, C, or D that must be changed to be correct.

28. National parks provide exceptional locations which visitors can view wildlife.

A. provide B. exceptional C. which D. can

29. My brother would have bought a sports car if he had enough money.

A. My B. bought C. sports D. had

30. The table is so small for the family to sit around.

A. The B. so small C. the family D. around.

1
1 tháng 4 2020

m hả ngọc

13 tháng 11 2019

Đáp án: D

7 tháng 4 2018

Đáp án: C

III. Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. 1. Half of the world’s rain forests have already been _______. A. endangered B. eroded C. found D. destroyed 2. You need warm clothes to _______ yourself from the cold. A. protect B. take C. destroy D. provide 3. Mark the letter A, B, C, or D to indicate the word(s) CLOSEST in meaning to the underlined word. Contamination is threatening the park and many species of...
Đọc tiếp

III. Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.

1. Half of the world’s rain forests have already been _______.

A. endangered B. eroded C. found D. destroyed

2. You need warm clothes to _______ yourself from the cold.

A. protect B. take C. destroy D. provide

3. Mark the letter A, B, C, or D to indicate the word(s) CLOSEST in meaning to the underlined word.

Contamination is threatening the park and many species of animals living in it.

A. Population B. Pollution C. Elimination D. Distribution

4. Nearly 1,000 of the world's bird species are threatened with__________.

A. appearance B. protection C. extinction D. destruction

5. We really ought to make a start on campaigns to __________ our polluted rivers and seas.

A. clean up B. clear away C. wipe out D. tidy up

6. Wildlife all over the world is in__________.

A. risk B. danger C. threat D. death

7.Thu Le zoo__________ many kinds of wild animals, such as tigers and lions.

A. covers B. includes C. consists D. contains

8. All the different plants and animals in a natural community are dependent upon each other for _______

A. wildlife B. survival C. livings D. life

9. The death of Lenin was a great ________ to the world proletarian movement.

A. lose B. loss C. lost D. loses

10. The __________ was caused by the fire .

A. destruction B. destructive C. destructively D. destroy

11. The new laws __________ wildlife in the area .

A. consist B. conserve C. connect D. contribute

12. My shirt __________ by my sister on my last birthday.

A. gave B. was given C. had been given D. was being given

13. This exercise may __________ with a pencil.

A. be written B. be to write C. be writing D. write

14. The money__________ to him 2 months ago, but it__________ back yet.

A. was lent/ had not been given B. has been lent/ was not given

C. was lent/ has not given D. was lent/ has not been given

15. Dynamite __________ by Alfred Bernard Nobel.

A. have been invented B. invented C. was invented D. was being invented

16. __________ this work __________ before you went to Moscow?

A. Will/ have been done B. Has/ been done C. Will/ be done D. Had/ been done

17. Mark the letter A, B, C, or D to indicate the word(s) OPPOSITE in meaning to the underlined word.

Man and animals need a constant supply of water to live.

A. irregular B. instant C. convenient D. chemical

18. Acid rain has caused severe ________ on the hill.

A. erosion B. pollution C. destruction D. floods

19. _________is one of the most effective way to protect the environment.

A. Conservation B. Conservationist C. Conservatory D. Conserve

20. What should we do to reduce the level of environmental________?

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

21. A large hydroelectric _______ was built on the River Danube.

A. power B. dam C. bank D. wall

22. We are now facing the possible __________ of several rare species .

A. danger B. variety C. disappearance D. existence

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