It was not until the entrance exams were in sight that__________ that I had so many books to

cover and so many exercises to finish.

A．I realized

B．did I realize

C．had I realized

D．I had realized

一级支行中一级支行行长、副行长每人使用面积不超过（）平方米。

A.10

B.15

C.20

D.25