2012-2013年六年級(jí)下冊(cè)英語Unit 2動(dòng)詞專項(xiàng)練習(xí)題

　　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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