Question

【题目】 I was playing computer games my brother was doing his homework.

A. after B. because C. while D. When

Answer 1

【答案】C

【解析】

试题分析：句意：当我的弟弟在做作业的时候，我在玩电脑游戏。A.在……之后；B.因为；C.当……时候（同时进行）；D.当……时候，就在这时。此题中两个动作同时进行，而且连词后是进行时态。所以要用while。故选C。