题目内容
They were surprised that a child should work out the problem ________ they themselves couldn't.
[ ]
A.once
B.then
C.while
D.if
答案:C
解析:
提示:
解析:
|
【巧解导析】此题是由两个分句组成的并列句.根据句意,分句之间表转折关系,四个选项中只有while是并列连词,含义为“而,却”. |
提示:
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【巧解点悟】while可接状语从句,也可接并列句.接并列句时,前后两个分句有对比意味. |
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