题目内容
The thief broke in, trying to open the safe, but ___________.
A. in no way B. in vain C. without effect D. at a loss
【答案】
B
【解析】这题考查词组辨析:in no way绝不,in vain徒劳, without effect无效,at a loss 不知所措,句意是:小偷闯入房间,想打开保险箱,但是徒劳。选B。
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