John promised his doctor he ________ not smoke, and he has smoked ever since.A．m
题型：不详难度：来源：
John promised his doctor he ________ not smoke, and he has smoked ever since.| A．might | B．should | C．could | D．would. |
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答案
| D |
解析
| 本题考查的情态动词的用法，特别是 could 和would 的意义区别。 Could, can 的过去式，主要表示“能够，可以，推测”等意义，而would 表示“将，愿意”，根据题***意义（约翰向医生许诺将不吸烟，而且从那以后就没有再吸烟。），故选择D。 |
举一反三
-------There were already five people in the car but they managed to take me as well .
------- It ______ a comfortable journey .| A．can’t be | B．shouldn’t be | | C．mustn’t have been | D．couldn’t have been |
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—Are you coming to Jeff’s party?
—I’m not sure. I__________ go to the concert instead. | A． must | B．would | C．should | D．might |
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—Will you stay for lunch?
—Sorry, ____________. My brother is coming to see me. | A． I mustn’t | B．I can’t | C．I needn’t | D．I won’t |
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He pushed the door again and again, but it ___ open.| A．may not | B．can"t | C．didn’t | D．wouldn"t |
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___ , we would have taken raincoats with us.| A．Had we known | B．We had known it | C．If we were known | D．If we know |
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