问题 选择题
At school,some students are active ________ some are shy,yet they can be good friends with one another.                                                   
A.whileB.although
C.soD.as
答案

A

解析 考查并列连词。句意为:在学校,一些学生很活跃而一些却很害羞,然而他们都可能彼此成为好朋友。根据句意选while,表示两个分句中两种情况的对比。

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