一、单选题（共 20 道试题，共 100 分。）
1. () the stress of examinations is over, we can all relax.
B. Even though
C. Now that
2. His courage and self-confidence were mostly based () knowledge.
3. The () of too much time to sports leaves too little time for studying.
4. He said that the driver must have had an accident; otherwise he () by then.
A. would have arrived
B. should arrive
C. must have arrived
D. would arrive
5. Sugar has great possibilities for use as the basis of () .
6. () more than one() in the early morning, I would hear the cry of a neighboring child.
7. The common form of sugar is derived () two plants: the sugar cane and the sugar beet.
8. They always give the vacant seats to () comes first.
9. The common form of sugar is derived () two plants: the sugar cane and the sugar beet.
10. I’ll go for a two-week tour, which allows some time in all the major cities for ().
11. It is the first time that we () such an interesting journey since we’ve been in college.
A. took part in
B. take part in
C. would take party in
D. have taken part in
12. This old building has () all kinds of weather.
A. been exposed to
B. exposed to
C. been exposed on
D. exposed on
13. Although the opinions were (), she didn’t accept.
14. The careless man received a ticket for speeding. He () have driven so fast.
15. These weapons add a new () to modern warfare.
16. The waiter was furious at () such a small tip.
C. being given
17. If I () harder at school, I would be sitting in a comfortable office now.
B. had worked
C. were to work
D. were working
18. He made up a wonderful reason to account() his absence.
19. Each year there are changes () different parts of the world.
20. () what to do, I telephoned the police.
A. Not to know
B. Do not know
C. Knowing not
D. Not knowing
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