What ___________ youdoyesterday?[ ]A.doB.didC.was-高中英语-魔方格

◎ 题干

If you try to understand _____ that prevents so many Americans from being as happy as one might expect,
it seems that there are two causes.

[ ]

A. what it does
B. why it is
C. why it does
D. what it is

◎ 答案

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◎ 解析

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◎ 知识点

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◎ 相似题

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