1.“ I don’t like to travel.” “Have you ever _____ in an airplane?”
A. flying B. flew C. flowed D. flown
答案:D
2. The center of gravity of the human body ______ behind his joint.
A. located B. locating C. to locate D. is located
答案:D
3.“ What happened in that new area?” “New houses ______ recently over there.”
A. are built B. build C. have built D. have been built
答案:D
4.“ When did you go to work?” “As soon as they came, we ______ to work.”
A. went B. were going C. had gone D. go
答案:B
5.“ Did you wait for him very long? ”“Yes,I ______ to bed until five in the morning.”
A. did go B. didn’t go C. had gone D. went
答案:B
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