单选题：When I try to understand ________ that prevents so many Amer

题目内容：
When I try to understand ________ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes. A．why it does
B．what it does
C．what it is
D．why it is
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阅读短文，回答题：Children would play with fire until their hands wer

阅读短文，回答题：Children would play with fire until their hands were burnt away if ____

分类：英语运用能力测试  题型：单选题
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阅读短文，回答题：The wallet which the writer found__________ A．was e

阅读短文，回答题：The wallet which the writer found__________ A．was empty 　　B．had some mo

分类：英语运用能力测试  题型：单选题
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心理测验按照所要测量的特征大体上可以分为_________和_________。

心理测验按照所要测量的特征大体上可以分为_________和_________。

分类：英语运用能力测试  题型：单选题
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