摘要：4．When I try to understand it is that prevents so many Americans from being as happy as one might expect, is seems to me there are quite a few causes. A．why; that B．which; as C．what; that D．whether; since
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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
查看习题详情和答案>>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
查看习题详情和答案>>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 does it | B．what does it | C．what it is | D．why it is |