-----Did Mary come to the party?---I don’t know．She _____while I was out．A．may h
题型：不详难度：来源：
-----Did Mary come to the party?
---I don’t know．She _____while I was out．| A．may have come | B．must have come | | C．might come | D．could come |
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答案
| A |
解析
试题分析：这题考查情态动词的完成式的用法：从第一句话知道是指过去的事，从-I don’t know，知道是可能已经来了。用may have come，A项正确。
点评：情态动词的完成式有两种用法：一种是对过去情况的推测，一种是对过去的虚拟，做题时要结合上下文来判断。还要注意情态动词的语气。 |
举一反三
Most people advise that students’ heavy burden __________.| A．reduce | B．be reduced | C．to be reduced | D．reduced |
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The manager demanded that the task ______ within a week.| A．must complete | B．would be completed | | C．be completed | D．must be completed |
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This is his only request that the room __________ after being used.| A．be cleaned | B．would be cleaned | | C．is cleaned | D．will be cleaned |
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All the settlers nearby demanded that the night club away as soon as possible.| A．remove | B．was removed | C．shall be removed | D．be removed |
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Smoking pollutes air. You ______ smoke here.| A．won’t | B．can’t | C．ought not to | D．needn’t |
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