Question

【题目】—What do you think makes him so sad?

— __________ the exam.

A. He failed B. He failing

C. His failing D. To have failed

Answer 1

【答案】C

【解析】句意:——什么使他如此伤心?——他考试没有及格。What do you think makes him so sad? 为疑问句,what在问句中做主语,答语也应做主语，因此，用动名词的复合结构。