While I _ a novel,someone _at the door.A.read,was knockingB.read ,knockedC.was reading,knockedD.was reading,was knocking为什么?

分类: 作业答案 • 2021-12-23 14:28:42

问题描述：

While I ___ a novel,someone ___at the door.
A.read,was knockingB.read ,knockedC.was reading,knockedD.was reading,was knocking
为什么?

答

D
当我正在读小说时,某个人在敲门
while后一般接进行时,这样后面就应该用过去进行时

While I ___ a novel,someone ___at the door.A.read,was knockingB.read ,knockedC.was reading,knockedD.was reading,was knocking为什么?