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题目
题型:不详难度:来源:
— I wonder how much you charge for your services.
— The first two are free _______the third costs $30.
A.whileB.until  C.whenD.before

答案
A.
解析

试题分析:考查连词:A. while然而,虽然,当…时候B. until直到C. when当…时候D. before在…前面,句意:--我想知道你的服务要多少钱?--前两个是免费的,第三个是30美元。选A。
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【— I wonder how much you charge for your services.— The first two are free ______】;主要考察你对连词等知识点的理解。[详细]
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