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 |
相关试题
—Your flight was quite late last night.
—Yes, it was midnight __________ our plane finally got to Jinan.
| A．that | B．when | C．since | D．until |
—I think I should wear a dress instead of this jeans.
—It’s just a small informal party, so you don’t have to ___________．
| A．warm up | B．put up | C．dress up | D．keep up |
—It’s a long journey．My car couldn’t make it.
—You can drive my car．It’s quite old, but it’s still pretty ___________.
| A．reliable | B．convenient | C．supportive | D．available |
The traffic slowed down because of the heavy snow in Yushu county, presenting a new __________ to the recovery from the earthquake.
A．suffe ring |
B．disaster | C．challenge | D．damage |
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