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

问题补充：

--- 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

答案：

(答案→)A. when

B. that

C. until

D. before

解析：句意：--皮特昨天晚上回来得早吗？--是的，还没有8点他就回来了。这里是when引导的定语从句，先行词是eight o’clock，关系副词在从句中状语，故选A。