Fit for boby,Fit for study."is an interesting exercise program in a Chinese high school.After 4:20pm,the students of the
问题描述：
Fit for boby,Fit for study."is an interesting exercise program in a Chinese high school.After 4:20pm,the students of the high school run _ exercise on the playground.
A.in B.over C.for D.by
答
觉得是C...