问题
He has given me so much help that I really want to do something for him ______.
A:in turn
B:by turns
C:in return
D:in answer.;
B:by turns
C:in return
D:in answer.;
正确答案是：
同类题型
His dream ____ to China never ____.
Chinese e-commerce giant Alibaba has fully ____food-delivery startup Ele. me to expand its business.
Let me introduce my cousin to you, who _____ to a famous university last year.
Thechairman thought ________ necessary to invite Professor Smith to speak at themeeting.