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题目
题型:不详难度:来源:
They were surprised that a child should work out the problem____ they themselves could not.
A.onceB.unlessC.whileD.if

答案
C
解析

试题分析:考查连词:A. once  一旦B. unless除非C. while当…时候,虽然,然而,D.if如果,句意:他们很惊讶的发现,一个孩子可以算出这个问题,而他们自己不能。选C。
点评:连词的辨析要放在上下文总进行,同时要注意一些形式相近的连词的词义辨析。While的用法较多,也是常考的连词。
核心考点
试题【 They were surprised that a child should work out the problem____ they themselve】;主要考察你对连词等知识点的理解。[详细]
举一反三
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A.unlessB.orC.andD.But

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A.sinceB.whenC.untilD.before

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