15. When thermal pollution happens, the water temperature in streams, rivers, lakes and oceans … . A. changes B. keeps

15. When thermal pollution happens, the water temperature in streams, rivers, lakes and oceans … .
A. changes B. keeps C. remains D. stays
16. Australia is home to … animals like kangaroos and koalas.
A. only B. rare C. unique D. precious
17. If you were the president, what … you do to help the environment?
A. will B. did C. would D. do
18.The Maori in New Zealand greet each other by … their noses.
A. touching B. punching C. blowing D. rubbing
19. The village’s drinking water … with poisonous chemicals since the factory came into operation.
A. contaminates B. is contaminated C. has contaminated D. has been contaminated
20. When the policeman came to the scene, the driver of the car …
A. have left B. had left C. leaves D. was left
21. Sciences and technology have enormous ______________ on economic development.
A. affects B. effects C. affect D. effect
22. I believe that our new manager has the … to work well in this business environment.
A. inflexible B. flexibly C. flexibility D. flexible
23. If the factory … dumping poison into the lake, all the fish and other aquatic animals will die.
A. continues B. continued C. will continue D. continue
24. You will recognize Jenny when you see her. She … a red hat.
A. wears B. is wearing C. will wear D. will be wearing
25. The farmer rides the buffalo -____________ carts loaded full of rice home.
A. draw B. drawing C. drew D. drawn
26. Little Pascal ……a mechanical calculator which could do additions or subtractions very quickly.
A. discovered B. found C. found out D. invented
27. Robots save workers from ………dangerous tasks.
A. making B. having C. performing D. carrying
28. Many people believe that robots have made workers jobless………that is not necessarily true.
A. but B. and C. so D. or
31. Science and technology have ………the life safe, secure and comfortable.
A. transformed B. made C. done D. changed
32. The teacher __ me I had better devote more time to science subjects such as physics, chemistry, and biology. A. said B. talked C. spoke D. told
33. Science is used in all corners of the world for the __________ of people.
A. interest B. need C. profits D. benefit
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