He realized his mistakes and took action to reduce the loss _________ it was too late.

A. until                         B. when                                C. before             D. as

 

【答案】

C

【解析】

試題分析：句意：他意識(shí)到自己的錯(cuò)誤并且采取措施來(lái)盡可能地減少損失。before意為“在……之前”，即在太晚之前采取措施；故選C。

考點(diǎn)：考查連詞。

 

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