-Mr Smith plays tennis with his friends every day.-Yes……
问题描述：
-Mr Smith plays tennis with his friends every day.-Yes……
-Mr Smith plays tennis with his friends every day.
-Yes.He dose this _____ exercise.he wants to keep fit.
A.for
B.with
C.of
D.on
答
A Smith先生每天和朋友打网球以锻炼身体.
1)for表示目的,
2)exercise [U]运动,锻炼身体; [C]练习作业;[pl]运动操,如do eye exercises/moring exercises;
3)vt 运动,锻炼,一般跟反身代词 exercise oneself.