— Can we leave the classroom now?— No, you ______. You ______ to leave until th
题型：不详难度：来源：
— Can we leave the classroom now?
— No, you ______. You ______ to leave until the bell rings.| A．mustn’t, are allowed | B．don’t have to, are allowed | | C．needn’t, aren’t allowed | D．can’t, aren’t allowed |
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答案
| D |
解析
试题分析：句意：——现在我们能离开这个房间吗？——不，你不能。直到铃响了你才允许离开。not …until直到……才……，can引导的一般疑问句，否定回答仍用can，故选择D。 |
举一反三
| — Is Jim coming by train? —I’m not sure. He _________ drive his car. |
----_______I come back before 11:00?
----No, you________. But you ________be back later than lunch-time.| A．Can; can’t; may | B．Must; needn’t; can’t | | C．Need; mustn’t; must | D．May; needn’t; can’t |
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—Dad, must I finish my homework today?
—No, you ______. You may do it tomorrow.| A．needn’t | B．mustn’t | C．don’t | D．won’t |
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– I can’t give up smoking, doctor.
– For your health, I’m afraid you _______.
A. may B. can C. have to |
The lady in this photo _______ be over fifty! She looks so young!| A．mustn’t | B．can’t | C．must | D．can |
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