The thief broke in, trying to open the safe but ________.
A.in no way
B.in vain
C.without effect
D.at a loss
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B解析句意:小偷闯了进来,试图打开保险柜,但徒劳无功。in no way绝不。如:In no way should the result be seen as a defeat for the government.这种结果绝不能被视为政府的失败。in vain--uselessly; without a successful result 白费地,徒劳无益地。如:They tried in vain to make him change his idea.他们想让他改变主意,却白费心机。at a loss--uncertain what to do, think or say; confused困惑,(茫然)不知所措。如:I was at a loss for words when he told me the news.当他告诉我那个消息时,我不知说什么好。