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1. Only recently ___________ to realize the dangers caffeine(咖啡因)
 might bring to our health.
A. that scientists began               B. have scientists begun
C. scientists have begun               D. that did scientists begin
2. Not until the year of 1954 ________ made the capital of this country.
       A. the city was                        B. was the city
       C. when the city was                   D. was when the city
3. ___________ the doctor right away, he might be alive today.
       A. Should he have gone to              B. If he went to
       C. Were he to go                       D. Had he gone to
4. "Does your father call you very often?"
   "yes, my fater calls about once a week and ___________ ."
       A. so my brother does                  B. my brother does so
       C. so does my brother                  D. does so my brother
5. Hardly anything ___________ more than the happiness of seeing someone 
using his device for treatment.
       A. please him                          B. does please him
       C. pleases him                         D. does him please
6. So little ___________ about physics that the lecture was completely 
beyond me.
       A. I knew                              B. did I know
       C. I had known                         D. had I known
7. We are late! Look, ___________ !
       A. there the bus goes                  B. the bus goes there
       C. there goes the bus                   D. the bus there goes
8. Only after he has acquired considerable facility in speaking
___________ to learn to read and write.
       A. he began                            B. will he begin
       C. did he begin                        D. must he begin
9. Busy ___________ he is, he can fulfill the task ahead of schedule.
       A. because                             B. as
       C. no matter how                       D. although
10. By no means ___________ create or destroy energy.
       A. we can                              B. we can't
       C. can we                              D. shall we
11. How strange ___________ !
       A. that the children are so quiet is
       B. that the children so quiet are
       C. is the children are so quiet
       D. it is that the children are so quiet
12. Not only ___________ tolerant of other people's opinion,
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 but he is also patient.
       A. he is                               B. is he
       C. he will be                          D. will he be
13. She never laughed, ___________ lose her temper.
       A. neither she did                     B. nor did she
       C. either did she                      D. she either
14. ___________ table tennis was accepted as a regular part of
the Olympic Games.
       A. Not until 1986                B. It was not until 1986 that
       C. It was in 1986 when           D. It was until 1986 that
15. ___________ that Susan hadn't dared to make a sound.
       A. So was he absorbed                  B. So absorbed he was
       C. So absorbed was he                  D. So he was absorbed
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