9.Mr Liu asked Sam why ________ keep his eyes ________ while doing the eye exercises.( )
| A. | didn't he; close | B. | he didn't; close | ||
| C. | didn't he; closed | D. | he didn't; closed |
8.---Lily,why are you still here?School has been over for half an hour.
---I ________ my task yet.I still need an hour to finish it.( )
---I ________ my task yet.I still need an hour to finish it.( )
| A. | won't finish | B. | didn't finish | ||
| C. | haven't finished | D. | hadn't finished |
5.-What a heavy haze!The air pollution is terrible now.
-It _________ worse unless we _________ action to protect the environment.( )
-It _________ worse unless we _________ action to protect the environment.( )
| A. | is; will take | B. | will be; will take | ||
| C. | will be; take | D. | won't be; take |
4.-Remember that you _________ play balls in the street!
-I see.It's too dangerous.( )
-I see.It's too dangerous.( )
| A. | may not | B. | can't | C. | mustn't | D. | needn't |
2.You must be quiet in the library,If you make a lot of _____,you may disturb others.( )
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| A. | voices | B. | noise | C. | sounds |