I will never understand how it that you failed in the examination for you are such a good

问题补充：

I will never understand how it that you failed in the examination for you are such a good student.

A. came about

B. brought in

C. stayed up

D. ended up

答案：

(答案→)A. came about

B. brought in

C. stayed up

D. ended up

解析：考查词组：A. came about发生B. brought in引进，赚钱C. stayed up熬夜D. ended up结束，句型：How did it come about that…，怎么会…,句意：我永远不能理解我是怎么考试不及格的，因为我是好学生。选A。