问题

People have come to understand _____ prevents so manyAmericans from being as happy as one might expect.

A:that it iswhy
B:what does itthat
C:why it doesthat
D:what it isthat

正确答案是：

同类题型

下列加线的成语使用正确的一项是（）

Now that the banks are back on their feet, we expect the extraordinary______ from them to help rebuild the economy.

If the shop _____ soon, we won’t buy this kind of shoesShall we go shopping this afternoon? —OK, can’t agree more

Only with this method_____to make progress in your maths study .

Does Jason feel _________ in his new school—I don’t think so. He has already made a few friends there.