A-A+
When I try to understand_____that prevents so
问题详情
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请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析：本题考查的是句式比较复杂的强调句。A、B两个选项不符合强调句的基本结构，可首先排除。题中understand的宾语是一个what从句，而从句本身又是一个强调句型，等于it is(what)that prevents so many Americans from being as happy as one might expect.
