题目内容
— ____ we go to help him with his work?—No, you needn’t. He ____ finish it all by himself.
A. Must; can’t B. May; can C. Must; can
must表示“必须”,用must提问时,其否定回答用needn’t。can表示“可以,能够”。
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—Mr. Wang________here now. He left for Shanghai by air this morning.
| A.must be | B.can be | C.mustn’t | D.can’t be |