Question

We________TV when the alarm________off．

1. A.
   watched，went
2. B.
   were watching，went
3. C.
   were watching，was going
4. D.
   watched，was going

Answer 1

B
分析：句意是“当警报响时，我们在看电视。”由when引出时间状语从句时，两个表示过去的动作如果一个是持续性，一个是短暂性动作，那么持续性动作用过去进行时，短暂性动作用一般过去时。were watching是持续性动作，went off是短暂性动作。