Question

【题目】When it began to rain heavily, she ________ for a bus at the bus stop.

A. waited B. waits C. is waiting D. was waiting

Answer 1

【答案】D

【解析】句意：当雨下得很大时，她正在公共汽车站等公共汽车。A. waited一般过去时；B. waits一般现在时；C. is waiting现在进行时；D. was waiting过去进行时。when引导的时间状语从句，从句用一般过去时，主句用过去进行时；故选D。