单选题Lisa was busy taking notes _____ Mark was searching the Internet for the information.AuntilBunlessCwhileDif

单选题
Lisa was busy taking notes _____ Mark was searching the Internet for the information.
A

until

B

unless

C

while

D

if


参考解析

解析:
本题考查连词用法。句意:马克上网查资料时,莉莎正忙着做笔记。until意为“到……为止,在……以前,直到……才”;unless意为“如果不,除非”;while意为“当……的时候;然而”;if意为“如果”。句中两个分句都是过去进行时,表示同时发生的动作。正确答案选C。

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