Some people feel easy and fortable to be served by others but when they are asked to serve others , they are unwilling or even hate to do so.
A. in turn
B. in their turns
C. in their turn
D. by their turn
网友回答
A. in turn
B. in their turns
(答案→)C. in their turn
D. by their turn
解析：“有些人被别人服务感到很惬意舒服，但是当轮到他们为别人服务时就很不情愿甚至讨厌做。”in turn“轮流” in one’s turn“轮到某人”，答案C。