______ allow drugs to become uncontrolled in our district. [ ]A. In certain
题型：同步题难度：来源：
| ______ allow drugs to become uncontrolled in our district. |
| [ ] |
A. In certain circumstances can we
B. In no circumstances we can
C. Under any circumstances we can
D. Under no circumstances can we |
答案
| D |
举一反三
| We have to admit that never in the past twenty years ________ so greatly as before. |
| [ ] |
A. did the city change
B. the city has changed
C. has the city changed
D. the city had changed |
| Not until ________ the exam ________ the importance of doing homework. |
| [ ] |
A. had he failed; he realized
B. he had failed; did he realize
C. he had failed; he realized
D. had he failed; did he realize |
| Not until they left school ________ how much their teachers loved them and helped them. |
| [ ] |
A. they realized
B. had they realized
C. they would realize
D. did they realize |
| _______ my eyes when I began to imagine the most fantastic scene in China"s Got Talent. |
| [ ] |
A. Not until I had closed
B. No sooner had I closed
C. Scarcely I had closed
D. Hardly had I closed |
| So ________ that all the living things are dying out gradually. |
| [ ] |
A. serious polluted the lake is
B. serious polluted is the lake
C. seriously polluted is the lake
D. seriously polluted the lake is |
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