The discussion alive when an interesting topic was brought in.A. was comingB. had comeC

发布时间：2020-08-17 13:26:02

The discussion      alive when an interesting topic was brought in.
A. was ing
B. had e
C. has e
D. came

网友回答

A. was ing
B. had e
C. has e
(答案→)D. came
解析：讨论变得有趣是在有了好话题之后，所以B项错；e alive是瞬间性的，所以A项错；如选C项，when应改为since。
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