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()4.IcheckmybagtoIdon'tleaveanythingimportantbehind.A.makingsureB.makesureC.beingsureD.sure

题目详情

( ) 4. I check my bag to ____ I don't leave anything important behind.

   A. making sure   B. make sure   C. being sure   D. sure

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答案和解析
4.B