Only then, we that the trapped miners were in danger when the flood water dripped into the

发布时间：2020-08-16 11:24:19


Only then,     we     that the trapped miners were in danger when the flood water dripped into the tunnels.
A. have; realized
B. did; realize
C. do; realize
D. had ; realized

网友回答

A. have; realized
(答案→)B. did; realize
C. do; realize
D. had ; realized
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