Mary gave Jack so much help that he gave her some roses for her kindness
A. in turn
B. by turns
C. in answer
D. in return
网友回答
A. in turn
B. by turns
C. in answer
(答案→)D. in return
解析：句意：Mary给了Jack很多帮助，所以作为她善良的回报，Jack送给Mary一些玫瑰花。in turn依次；by turns轮流地；in answer回答；in return作为回报，选D。