When I try to understand ______ that prevents so many Americans from being as ha
题型：专项题难度：来源：
When I try to understand ______ that prevents so many Americans from being as happy as one might expect,
it seemed to me that there are two causes. |
| [ ] |
A. why it does
B. what it does
C. what it is
D. why it is |
答案
| C |
举一反三
| Was it because of the heavy snowstorm in Europe _____ the flight had to be put off? |
| [ ] |
A. which
B. so
C. why
D. that |
— It was careless of you to have left your clothes outside all night.
— My god! _______. |
| [ ] |
A. So did I
B. So I did
C. So were you
D. So did you |
| It was Martin Luther King"s struggle ______ helped black Americans to get equal rights. |
| [ ] |
A. which
B. that
C. who
D. as |
| The police were looking into the accident, hoping to find out _______ that had caused it. |
| [ ] |
A. what it was
B. what was it
C. how it was
D. how was it |
| It was not until yesterday _____ I realized how important English was. |
| [ ] |
A. when
B. that
C. which
D. what |
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