Question

I was doing my homework in my bedroom _______the light went out. I did it with a candle on.

A．which

B．while

C．when

D．where

Answer 1

C

试题分析：句意：我正在我的卧室写作业，突然这时等灭了，我点了一支蜡烛做的作业。while “在......期间”，表示一段时间，引导的状语从句的谓语动词是持续性动词；when “在这时”，表示时间点，引导的状语从句的谓语动词是持续性动词或瞬间性动词。go out 是瞬间性动词，所以此处用when 来引导句子。故选C。