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

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：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。