—Could you please come to the museum with me this afternoon?—Sorry，I ________．I
题型：不详难度：来源：
—Could you please come to the museum with me this afternoon?
—Sorry，I ________．I have to take a piano lesson at 2 pm．| A．couldn’t | B．mustn’t | C．can’t | D．needn’t |
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答案
| C |
解析
| Could在句中表委婉的请求，否定回答是要用can’t。而不是couldn’t。所以选C。 |
举一反三
--- 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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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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