11.29 时态、语态练习
1.“I don’t like to travel. ”“Have you ever _____ in an airplane?”
A. flying B. flew C. flowed D. flown
2.The center of gravity of the human body ______ behind his joint.
A. located B. locating C. to locate D. is located
3.“Today is very cold, isn’t it?” “Yes, the river is _____ over.”
A. freezed B. freeze C. frozen D. freezing
4.“What happened in that new area?” “New houses ______ recently over there.”
A. are built B. build C. have built D. have been built
5.“When did you go to work?” “As soon as they came, we ______ to work.”
A. went B. were going C. had gone D. go
6.“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
