题目内容

【题目】Some people get in touch with each other by mobile phones__________ others keep contact with each other by e-mail.

A. when B. before C. while D. since

【答案】C

【解析】考查连词:A. when时候B. before之前C. while时候,然而,虽然,D. since既然,句意:一些人通过手机彼此联系,然而一些人通过电子邮件联系。选C。

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