问题
选择题
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
答案
答案：A
此句是I didn't realize that I had so many books to cover and so many exercises to finish until the entrance exams were in sight．的强调句。not until…in sight位于强调结构中，realize就变成肯定，用过去时。