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单选题
Lisa was busy taking notes _____ Mark was searching the Internet for the information.
A
until
B
unless
C
while
D
if
参考答案
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。
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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