—Are you free after school?
—Sorry. I’ve planned to treat a friend of mine to dinner for his help.
A. in addition
B. in turn
C. in return
D. in total
网友回答
A. in addition
B. in turn
C. in return
D. in total
解析:介词短语辨析。A另外;B依次,轮流;C作为回报;D总共,共计;句意:—放学以后你有空吗?—打不完。我计划去请一个朋友吃饭一回报他的帮助。根据句意什么吗C正确。