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

问题补充：

----Did Jack come back early last night?

------Yes. It was not yet eight o’clock he arrived home.

A. before

B. when

C. that

D. until

答案：

A. before

(答案→)B. when

C. that

D. until

解析：考查时间状语从句：句意：--昨晚杰克回来早吗？--是，他回来的时候还不到10点。不能理解成是强调句，因为强调句的结构去掉的话，这句话缺少介词at，不是完整的句子。选B。