At school，some students are active ________ some are shy，yet they can be good friends with one another.                                                    (2012·四川，4)
A．whileB．a(chǎn)lthough
C．soD．a(chǎn)s
A
解析　考查并列連詞。句意為：在學校，一些學生很活躍而一些卻很害羞，然而他們都可能彼此成為好朋友。根據(jù)句意選while，表示兩個分句中兩種情況的對比。
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