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withteenswhospendmuchoftheirfreetimeinfrontofTVsetsthosewhoarephysicallyactiveoftenhavebettergrades.A.ComparedB.TocompareC.ComparingD.Havingcompared

题目详情

        with teens who spend much of their free time in front of TV sets those who are physically active often have better grades.

         A. Compared          B. To compare          C. Comparing           D. Having compared

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A