3.we [ ]TV at midnight when our teacher came in.

问题描述:

3.we [ ]TV at midnight when our teacher came in.
A.are wathing
B.watched
C.were watching
D.wath
要原因和答案昂,写清楚

C.were watching
后面的when our teacher came in中的came in进来是过去时态
前后时态一致,所以前面也应该是过去式,A和D(?)排除,当老师进来的时候,我们肯定是正在看电视,所以是过去进行式,为were watching