2012-2013年外研版英语六下：Unit2练习题及答案
2012-2013年外研版英语六下：Unit2练习题及答案动词专项练习：
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.”
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