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题目
题型:不详难度:来源:
Whoever leaves the room last must ______ that all the lights are turned off.
A.is sureB.make sureC.find outD.look out

答案
B
解析
短语必须。B确定;C发现,查明;D当心;A项不能放在must的后面。句意:任何一个最后离开房间的人必须确定所有的灯都被关闭了。根据句意说明B正确。
核心考点
试题【Whoever leaves the room last must ______ that all the lights are turned off.A.is】;主要考察你对动词及动词短语辨析等知识点的理解。[详细]
举一反三
The little boy is dirty from head to foot because he ___ in the mud all morning.        
A.has playedB.is playingC.has been playingD.was playing

题型:不详难度:| 查看答案
The engine of the ship was out of order and the bad weather________ the helplessness of the crew at sea.
A.added toB.resulted fromC.turned outD.made up

题型:不详难度:| 查看答案
She         to beat the world record but failed at last.
A.succeededB.attemptedC.advisedD.offered

题型:不详难度:| 查看答案
—Sleep well last night?
—Far from that! My next-door neighbor       music pretty loud.
A.playsB.had playedC.would playD.was playing

题型:不详难度:| 查看答案
How much does that      ?
A.addB.add upC.add toD.add up to

题型:不详难度:| 查看答案
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