Question

--- Did Peter come back early last night?
--- Yes. It was not yet eight o’clock _________ he arrived home.

A．when

B．that

C．until

D．before

Answer 1

A

试题分析：考查时间状语从句，it指时间，when引导时间状语从句，句意：当他到家的时候还不到8点。选A。
点评：这句话容易错选成B项，考生会以为是强调句，但是强调句的特点是把强调句结构去掉，句子仍然成立，而这句话如果去掉It was …that后，句子缺少介词，是不完整的，只能理解成时间状语从句。