问题
选择题
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
题目分析：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。