Iwasdoingmyhomework

问题详情：

 I was doing my homework ______ my mother was cooking in the kitchen.

A. after                                  B. while

C. if                                      D. until

【回答】

B。考查连词辨析。句意: 妈妈在厨房做饭的时候, 我正在做作业。while引导时间状语从句, 两个动作同时进行, 主从句都用过去进行时。故选B。

知识点：连词

题型：选择题