—Jenny，how did your math exam go?
—I thought I ，but in fact I came in the top 10% in the class.
A. might have failed
B. couldn’t have failed
C. should have failed
D. mustn’t have failed
网友回答
(答案→)A. might have failed
B. couldn’t have failed
C. should have failed
D. mustn’t have failed
解析：这题考查情态动词的虚拟语气，might have done“本来会做…却没做”，句意是：--Jenny，你数学考试怎样，我还以为会不及格，但事实上我是班级前10%。选A。