--- May we leave the classroom now? --- No, you ____________ . You ____________
题型：不详难度：来源：
--- May we leave the classroom now?
--- No, you ____________ . You ____________ to leave before 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
| mustn’t 语气非常重，表示“一定不要，禁止”等，一般不轻易用；can’t语气相对轻一些，常常用作may的否定；另外，当may表示推测“可能”时，其否定为：may not。跟据上文可知，D为最佳答案，不，你不能。铃响之前不许你离开。 |
举一反三
We _______ talk loudly when we see the sign “ Be quiet ”on the right. | A．must | B．mustn’t | C．need | D．needn’t |
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—Jim, ________ you answer the last question?
-- Sorry, I can’t. It’s too hard. |
—Look, someone is coming. Guess who ____________.
—Jack. He’s always on time.| A．can it be | B．it can be | C．can he be | D．he may be |
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If you _____the book, you ____ buy it right now, I think.| A．needn’t, needn’t | B．don’t need, don’t need | | C．don’t need, needn’t | D．don’t need, needn’t to |
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— Must we get to the theater at 7:00?
— No, you _______. The movie begins at 8:00.| A．can’t | B．must’t | C．needn’t | D．shouldn’t |
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