I am ashamed, sir, that I wasted the many hours I should have studied in class.A. while

发布时间：2020-08-16 07:43:13

I am ashamed, sir, that I wasted the many hours      I should have studied in class.
A. while
B. before
C. which
D. when

网友回答

A. while
B. before
C. which
(答案→)D. when
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