---Guess what! I have own the first prize in the speaking competition.
---Congratulations! You ______ put a lot of work into it.
---Congratulations! You ______ put a lot of work into it.
| A．should | B．must |
| C．should have | D．must have |
更新时间：2016-03-24 15:49:12
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【知识点】 must have done的用法
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【推荐1】—The expression on his face suggests he ________ have failed in the competition.
—I guess so. It’s not easy after all.
—I guess so. It’s not easy after all.
| A．should | B．could |
| C．must | D．might |
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【推荐2】I appreciate your kindness very much, but you________ have bought such an expensive present.
| A．needn't | B．mustn't | C．wouldn't | D．couldn't |
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