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精英家教網 > 高中英語 > 題目詳情

Facing the dangerous situation, he was completely______.

A．at loss

B．at a loss

C．out of order

D．out of sight

本題考查介詞短語。句意: 面對危險的局面，他完全不知怎么辦。at a loss不知所措；無計可施；out of order出故障的；out of sight在視野外。結合句意可知選B。

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