Many questions have been answered by John. He must have previewed the lessons la
题型：不详难度：来源：
Many questions have been answered by John. He must have previewed the lessons last night, ____ he?| A．needn’t | B．hasn’t | C．didn’t | D．mustn’t |
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答案
| C |
解析
| 考查反义疑问句。此题中含有情态动词表推测用法，must have done 表示对过去事情肯定的推测，根据时间last night，动作在昨天晚上，所以用didn’t反问，选C。 |
举一反三
— Linda hasn’t shown up yet.
— It’s strange. She ____.| A．could | B．might | C．must have | D．should have |
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You have a big mouth,Tom. You have told everybody the secret.| A．shouldn’t | B．mustn’t | C．can’t | D．mightn’t |
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| With economy increasing steadily, people ______ enjoy a life of higher quality. |
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______ this afternoon, you would have to come again next week．| A．The boss didn’t return | B．The boss were not to return | | C．Were the boss not to return | D．Didn’t the boss return |
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