Question

【题目】Many people for a lecture to be given by a famous environmentalist when there was a power failure.

A. will wait B. were waiting

C. had waited D. waited

Answer 1

【答案】B

【解析】句意为：很多人正在等待着由一个著名的环保主义者做的演讲，这时突然停电了。由句意及句中的“was”不难看出，此处说的是过去某一时间正在进行的动作，故用过去进行时。题干也是sb.was doing sth.when...“某人正在做某事，这时突然……”的结构。故选B。