—You have made a lot of mistakes in the exam.
—___________
—I’ll give you a second chance.
A.You must be kidding.
B.I’m afraid not.
C.How come?
D.What should I do?
D
这是一段师生间的对话。从第三句话判断要填的应该是个问句,学生问老师“那我该怎么做?You must be kidding.你一定是在骗我;How come?怎么会呢?不符合语境。