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

问题补充：

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. I realized

B. did I realize

C. had I realized

D. I had realized

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