问题
__ 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;
B:To compare
C:Comparing
D:Having compared;
正确答案是：
同类题型
Stop making so much noise ____ the neighbor will start complaining
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It is in the year of 2010__________ a severe drought hit Yunnan province.
Tu Youyou is famous ____ her medical research and won the Nobel Prize this year.