摘要:The light in the room was too poor, so we couldn’t see anything . A. good enough B. enough good C. well enough D. enough well
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---The light in the room is still on. Do you know_______?
---In order to prepare for the coming exam.
| A.if he works hard | B.why he stays up late |
| C.why is he so busy | D.when he will stop working |
—Is Mr. Green in the office?
—No, he ________ be in the office. Look, the light in the office is off.
A. mustn’t B. can’t C. needn’t D. may not
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