自考365为考生们精心整理了学位英语/成人英语三级“每日一练”习题（第2017年5月30日期），欢迎积极参与学习！更多精彩信息，请关注本站。

_____ you were busy, I wouldn't have bothered you with my questions.

A. If I realized

B. Had I realized

C. Did I have realized that

D. As I realized