【题目】Although the students complained sometimes, they found their efforts in the preparation for the play ________.
A.laid offB.switched offC.paid offD.gave off
在线课程【答案】C
【解析】
考查动词短语辨析。句意：尽管学生们有时候会抱怨，他们发现他们为这场话剧表演的准备所付出的努力得到了回报。根据Although引导的让步状语从句，complain与pay off是转折关系，尽管学生抱怨，大声努力得到了回报。可知此处选项C. paid off（回报，付清）正确。故选C。