21. Everyone must take part in __________ deforestation.
A. preventing B. reducing C. protecting D. conserving
22. I’m __________ that my school team didn’t win the first prize.
A. sure B. delighted C. disappointed D. relieved
23. Electricity, gas, water are very __________ for our life.
A. necessary B. necessity C. unnecessary D. luxury
24. We are looking forward __________ from the local authorities.
A. to hear B. hear C. to hearing D. heard
25. We went __________ working in the field although it was too dark.
A. to B. on C. into D. up
26.He wanted to watch the weather forecast, so he turned __________ the TV.
A. on B. down C. off D. at
27. Where do you want the telephone to be __________?
A. install B. stored C. installed D. store
28. Lighting accounts __________ 15 percent to 20 percent of the electricity bill.
A. to B. of C. for D. from
29. It’s necessary that __________________________ .
A. we may protect the environment B. we can protect the environment
C. we should protect the environment D. we might protect the environment.
30. If factories have better methods to protect the environment, _________________________ .
A. we won’t have to suffer the air pollution.
B. we won’t have to suffer from the air pollution
C. we wouldn’t have to suffer the air pollution
D. we wouldn’t have to suffer from the air pollution
21. Everyone must take part in __________ deforestation.
A. preventing B. reducing C. protecting D. conserving
22. I’m __________ that my school team didn’t win the first prize.
A. sure B. delighted C. disappointed D. relieved
23. Electricity, gas, water are very __________ for our life.
A. necessary B. necessity C. unnecessary D. luxury
24. We are looking forward __________ from the local authorities.
A. to hear B. hear C. to hearing D. heard
25. We went __________ working in the field although it was too dark.
A. to B. on C. into D. up
26.He wanted to watch the weather forecast, so he turned __________ the TV.
A. on B. down C. off D. at
27. Where do you want the telephone to be __________?
A. install B. stored C. installed D. store
28. Lighting accounts __________ 15 percent to 20 percent of the electricity bill.
A. to B. of C. for D. from
29. It’s necessary that __________________________ .
A. we may protect the environment B. we can protect the environment
C. we should protect the environment D. we might protect the environment.
30. If factories have better methods to protect the environment, _________________________ .
A. we won’t have to suffer the air pollution.
B. we won’t have to suffer from the air pollution
C. we wouldn’t have to suffer the air pollution
D. we wouldn’t have to suffer from the air pollution