21. ________ 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
22. Into the dark room _______, who was surprised when everyone shouted “Happy Birthday”.
A. walked David B. David walked C. David did walk D. did David walk
23. Not until I left home ________ in a house where the rooms were clear and carpeted.
A. I ever lived B. ever lived I C. I did ever live D. did I ever live
24. —When can I use your computer?
—Never! _______ should you touch it.
A. At no time B. In no time C. At any time D. At one time
25.--Do you often go to the gym? You look fit.
--On the contrary, seldom ______ in my spare time.
A. I work out B. did I work out C. I worked out D. do I work out
26. Only when the European countries' financial system broke down _____to take measures to deal with those problems.
A. did they decide B. they decided C. they had decided D. had they decided
27. Only with the greatest of luck _ to escape from the rising flood waters.
A. managed she B. she managed C. did she manage D. she did manage
28. The old couple have been married for 40 years and never once _______ with each other.
A. they had quarreled B. they have quarreled
C. have they quarreled D. had they quarreled
29. Try she might, Sue couldn’t get the door open.
A. if B. when C. sine D. as
30. Maybe you have been to many countries, but nowhere else such a beautiful palace.
A. can you find B. you could find C. you can find D. could you find
21. D。Under no circumstances表示“在任何情况下都不”，位于句首才能部分倒装。
22. A。地点状语位于句首句子采用完全倒装语序。
23. D。not until…位于句首主句采用部分倒装语序。
24. A。四个选项中只有at no time表示否定意义，“在任何时候都不”，in no time立即。
25. D。Seldom放句首应用倒装句式。根据语境应用一般现在时态。
26. A。only修饰状语从句位于句首，则主句采用部分倒装语序。
27. C。only修饰的介词短语位于句首，则句子采用部分倒装语序。
28. C。not, little, hardly, never等否定意义词位于句首时后面采用部分倒装语序。
29. D。这是“动词+as+主语+谓语”倒装句，表示“虽然，尽管”。
30. A。否定副词nowhere放句首，句子要采用部分倒装；结合语境，这里表示现状，应用can而不是could。
A. In certain circumstances can we B. In no circumstances we can
C. Under any circumstances we can D. Under no circumstances can we
22. Into the dark room _______, who was surprised when everyone shouted “Happy Birthday”.
A. walked David B. David walked C. David did walk D. did David walk
23. Not until I left home ________ in a house where the rooms were clear and carpeted.
A. I ever lived B. ever lived I C. I did ever live D. did I ever live
24. —When can I use your computer?
—Never! _______ should you touch it.
A. At no time B. In no time C. At any time D. At one time
25.--Do you often go to the gym? You look fit.
--On the contrary, seldom ______ in my spare time.
A. I work out B. did I work out C. I worked out D. do I work out
26. Only when the European countries' financial system broke down _____to take measures to deal with those problems.
A. did they decide B. they decided C. they had decided D. had they decided
27. Only with the greatest of luck _ to escape from the rising flood waters.
A. managed she B. she managed C. did she manage D. she did manage
28. The old couple have been married for 40 years and never once _______ with each other.
A. they had quarreled B. they have quarreled
C. have they quarreled D. had they quarreled
29. Try she might, Sue couldn’t get the door open.
A. if B. when C. sine D. as
30. Maybe you have been to many countries, but nowhere else such a beautiful palace.
A. can you find B. you could find C. you can find D. could you find
21. D。Under no circumstances表示“在任何情况下都不”，位于句首才能部分倒装。
22. A。地点状语位于句首句子采用完全倒装语序。
23. D。not until…位于句首主句采用部分倒装语序。
24. A。四个选项中只有at no time表示否定意义，“在任何时候都不”，in no time立即。
25. D。Seldom放句首应用倒装句式。根据语境应用一般现在时态。
26. A。only修饰状语从句位于句首，则主句采用部分倒装语序。
27. C。only修饰的介词短语位于句首，则句子采用部分倒装语序。
28. C。not, little, hardly, never等否定意义词位于句首时后面采用部分倒装语序。
29. D。这是“动词+as+主语+谓语”倒装句，表示“虽然，尽管”。
30. A。否定副词nowhere放句首，句子要采用部分倒装；结合语境，这里表示现状，应用can而不是could。
