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【题目】—I can’t find my pen in the classroom?

—One of the children ________ have hidden it up.

A.canB.mustC.needD.would

【答案】B

【解析】

句意:——我在教室里找不到我的钢笔了.——一定是有个孩子把它藏起来了。

考查情态动词。can可能;must一定,肯定;need需要;would将要。根据must have done sth表示对过去事情的肯定推测。由must,情态动词肯定,必须。must have done sth 肯定做了某事。结合句意可知,此空应填must,故选B

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