【题目】________ 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

【答案】A
【解析】句意：与那些把大量空闲时间花在电视机前的孩子们相比，那些积极锻炼的经常会有更好的成绩。固定搭配：Compared with/to---，与---相比较。所以答案是A。