—Are you free after school?—Sorry: I’ve planned to treat a friend of mine to dinner for h

问题补充：

—Are you free after school?

—Sorry: I’ve planned to treat a friend of mine to dinner for his help.

A. in terms

B. in honor

C. in turn

D. in return

答案：

A. in terms

B. in honor

C. in turn

(答案→)D. in return

解析：本题回答语的含义是我计划为我的朋友安排一顿晚饭，作为他对我提供帮助的回报，in return表示作为回报的意思，符合本题的含义，故本题选D。