1. _______ air is composed of about 78 percent nitrogen and only about 21 percent oxygen, is a little known fact on the streets.
A. How that
B. That
C. When
D. However
答案：
A
B
C
D
2. George Washington once said that _______ have virtue enough to withstand the highest bidder.
A. few men
B. the few men
C. few are the men
D. the men are few
答案：
A
B
C
D
3. After much criticism, the politician _______ his controversial statement of the previous day.
A. quickly retracted
B. quickly retracted to
C. quickly was retracted
D. quickly has retracted
答案：
A
B
C
D
4. This method is widely used _______ algorithm is not only effective but also very simple.
A. because its
B. because
C. it is because
D. because of its
答案：
A
B
C
D
5. The vague and misleading instructions _______ in two entirely opposite ways.
A. could been interpreted
B. could be interpret
C. could easily be interpreted
D. could easily interpreted
答案：
A
B
C
D
6. John Smith, _______ of economic crimes, tax evasion and fraud, is being accused of attempted murder now.
A. of that he was accused
B. that was accused
C. whom he was accused
D. who was accused
答案：
A
B
C
D
7. After the discovery of the abandoned getaway vehicle, ________ believed to be hiding in the nearby Riverside forest region.
A. that the bank robber is
B. the bank robber who
C. the bank robber is
D. the bank robber who is
答案：
A
B
C
D
8. There is a law in France, which says that only the family has the right to decide what _______ or not known about the health of a patient.
A. must be known
B. must have known
C. must have been known
D. must have been being known
答案：
A
B
C
D
9. One of Jane's favorite subjects in school is drama because _______ lots of fun and enjoys being part of it all.
A. has really she
B. she really has
C. she really is
D. is she really
答案：
A
B
C
D
10. A gifted scientist, Newton _______ some of the most fundamental laws in the history of science.
A. keeps discovering
B. who discovered
C. the discoverer of
D. discovered
答案：
A
B
C
D
11. I think Jane deserved to be fired for her __________ .
A. totally behavior irresponsible
B. behavior totally irresponsible
C. irresponsible totally behavior
D. totally irresponsible behavior
答案：
A
B
C
D
12. The judges had an extremely hard time deciding _______ .
A. who's painting was the best
B. whose painting was the best
C. painting who was the best
D. the best painting was who
答案：
A
B
C
D
13. Before Johnson & Smith reached great heights in the business world, ______ encountered many great difficulties in promoting their theories and methods.
A. they
B. who
C. which
D. and
答案：
A
B
C
D
14. We don't know __________ taught us noun clauses before.
A. if the teacher has
B. the teacher has
C. the teacher hasn't
D. whether teacher
答案：
A
B
C
D
15. It is said he was a man, _________ to have the vision of an eagle and courage of a lion.
A. who appeared
B. he appeared
C. that appears
D. and appears
答案：
A
B
C
D
16. Can you please tell me ________ ?
A. what time the next bus arrives
B. what time arrives the next bus
C. when arrives the next bus
D. when arrives the bus
答案：
A
B
C
D
17. _______ the variable drops by a unit of 1, the rank drops by X amount.
A. Why
B. Whenever
C. How
D. What
答案：
A
B
C
D
18. _______ appeared to be coming from the science lab next door.
A. The pungent unpleasant odor of burning plastic
B. The unpleasant pungent odor of burning plastic
C. The pungent unpleasant odor of plastic burning
D. The unpleasant odor pungent of burning plastic
答案：
A
B
C
D
19. Only after they had completed the analysis to that degree _______ how to apply technology to the needs of our enterprise.
A. did they ask to begin
B. did they begin to ask
C. they did begin to ask
D. to ask did they begin
答案：
A
B
C
D
20. _______ is a mystery. I wish that I could ask him.
A. How did it
B. What he did it
C. How he did it
D. When did it
答案：
A
B
C
D
