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5. you have made a mistake--- you’ve _______the letter.

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4. I should never have____________ becoming a drug user.

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3. The department was badly organized until she____________ it.

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2. The possibility of his stealing money from class can not be _________, for no evidence can prove his absence at that time.

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take off　　 take charge of　　 rule out　　 dream of　 　leave out
look into 　　　run after　　 run into　　　 step up show up　 　carry out

1. The local government has ________ a campaign against bird flu.

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8.　　　　　 With hard work, our class has made great _________(progressive) in maths study.

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7.　　　　　 　We have conducted a lot of survey on animals’ eating habits__________ (late).

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6.　　　　　 Some university students show no interest in literature while Jack and Mary have ________(similarity) tastes in it.

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5.　　　　　 The big earthquake has further____________ (strength) my determination to be a volunteer to help the people in Sichuan.

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4.　　　　　 To our surprise, the young woman was the__________ (murder) who has killed her parents.

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