Question

【題目】—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鋼筆了.——一定是有個(gè)孩子把它藏起來了。

考查情態(tài)動(dòng)詞。can可能；must一定，肯定；need需要；would將要。根據(jù)must have done sth表示對(duì)過去事情的肯定推測(cè)。由must，情態(tài)動(dòng)詞，肯定，必須。must have done sth 肯定做了某事。結(jié)合句意可知，此空應(yīng)填must，故選B。