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I、单项选择题（本大题共20小题，每题1分，共20分）

Choose the best answer from the choices given:

1. In the end , he __________. [ ]

a. got invited

b. gets invited

c. was invited

d. was to be invited

2. He wore dark glasses to avoid __________. [ ]

a. having been spotted

b. to be spotted

c. spotted

d. being spotted

3. A new theory __________ before it can be put into practice. [ ]

a. must be tested

b. be tested

c. can be tested

d. to be tested

4. Sooner than __________ for others, she started her own business. [ ]

a. working

b. worked

c. to work

d. work

5. I can't afford as __________ car as this one. [ ]

a. expensive a

b. an expensive

c. a more expensive

d. a most expensive 

6. Do what I tell you --__________! [ ]

a. or else

b. or so

c. and that

d. and do

7. This is the house __________ windows were broken. [ ]

a. whose

b. which

c. its

d. of which

8. A hot shower, a cup of milk, a bag of potato chips, and then a good sleep __________ the luxury that he needed after the examination. [ ]

a. are

b. was

c. were

d. is 

9. Every drop of tears, every moan out of pain and every cry for help then __________ like knife cutting deep into his heart. [ ]

a. was

b. are

c. were

d. is

10. I expect all the letters __________ promptly. [ ]

a. being typed

b. to be typed

c. having been typed

d. to have been typed

11. The information was later admitted __________ from unreliable sources. [ ]

a. to be obtained

b. to have been obtained

c. that it has been obtained

d. that it was obtained

12. For a child to give up less mature idea for a more sophisticate one, it requires that the child_____________ psychologically ready for the new idea. [ ]

a. is

b. be

c. were

d. would be

13. We still have a lot of problems __________. [ ]

a. unsolved

b. unsolving

c. unsolve

d. to be unsolved

14. He regretted __________ her the truth. [ ]

a. having told

b. to have told

c. had told

d. to tell

15. Domestic-made TV sets are not __________ imported ones at all. [ ]

a. more inferior than

b. inferior to

c. inferior than

d. more inferior as

16. __________ by accident __________ by design, he arrived too late to help us. [ ]