It was quite a long time he really realized the serious situation.A. sinceB. whenC. after

发布时间：2020-08-16 12:05:07


It was quite a long time      he really realized the serious situation.
A. since
B. when
C. after
D. before

网友回答

A. since
B. when
C. after
(答案→)D. before
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