Question

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

—One of the children ________ have hidden it up.

A.canB.mustC.needD.would

Answer 1

【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。