Question

【题目】________ the earthquake happened, most of the people ________ at home.

A. While; were sleeping B. When; slept C. While; slept D. When; were sleeping

Answer 1

【答案】D

【解析】句意：地震发生时，大多数人在家睡觉。when时间连词，在…时候； while时间连词，在…时候，引导时间状语从句，从句的动作正在进行。when从句的谓语动词可以在主句谓语动作之前、之后或同时发生；while从句的谓语动作必须是和主句谓语动作同时发生,从句的时态常用进行时态。故选：D。