Question

My father was reading newspapers ____ my mother was cooking at this time yesterday evening.

A．when

B．which

C．while

D．because

Answer 1

C

考查时间状语从句。When“当”，可加短暂性动词或延续性动词；while“当，而”；与延续性动词连用，常用于进行时。句意“昨晚这个时候，我爸爸在看报纸，而妈妈在做饭。”表对比用while，意为“而”。故选C。