He’s teaching me French my teaching him Chinese.A. in place ofB. in case ofC. in exchange

网友回答

A. in place of
B. in case of
(答案→)C. in exchange for
D. in honor of
解析：A代替=instead of B以防，万一C作为......的交换D为纪念。。。句意：他教我法语作为我教他中文的交换。