题目内容
【题目】Whoever leaves the room last must __________ that all the lights are turned off.
A. be sure B. make sure
C. find out D. look out
【答案】B
【解析】考查动词短语辨析。句意:最后离开房间的人要确保所有的灯都关了。be sure 一定会(心理状态);make sure查明;设法确保;find out找出,查明,发现;look out留神,注意;当心。
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