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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

1.He asked Mary if she...............by air before

A. Ever traveled B. Would ever travel C. Has ever traveled

2.” He Bod. Did you take the job?” Bob’s friend asked him.........

A. Did he take the job. B. Whether you took the job. C. If he had taken the job. D. Had he taken the job

3. John asked me........interested in any kind of sports

A. If I were. B. If were I C. If was I. D. If I was

4. John asked me........that film the night before

A. That I Saw. B. Had I seen. C. If I had seen. D. If had I seen

5. He says he........at school two years ago

A. Had worked B. Works. C. Has been working. D. Worked

6. Robert said that his father.......to Dallas the year before

A. Goes. B. Went. C.has gone. D. Had gone

Environment. 1. “ I live here with my parents “. -> He said........ 2. “ Our new house is beautiful “. -> He said.... 3.” I wan to be a teacher of English “. -> He said....... 4.” I can’t speak Chinese “. -> She said..... 5.” My sister is now having a wonderful time in nha trang”. -> He said....... 6.” I’ll be very busy today “. -> She said...... 7.” I must come to the meeting tomorrow “. -> He said...... 8.” Peter and sue are getting married tomorrow “. -> He said....

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