－What do you think of Peter?－He is a helpful person. He is always helping people without e

－What do you think of Peter?
－He is a helpful person. He is always helping people without expecting anything .
A. in turn
B. in return
C. on his turn
D. on the turn

A. in turn(答案→)B. in returnC. on his turnD. on the turn解析：本题回答语的含义是他是一个乐于助人的人，总是帮助别人而不指望回报，in return表示回报的意思，故本题选B。

和我的回答一样，看来我也对了