－Did Tom go back late last night?—No. It was just nine o’clockhe arrived home.A. whenB. af

问题补充：

－Did Tom go back late last night?

—No. It was just nine o’clockhe arrived home.

A. when

B. after

C. until

D. that

答案：

(答案→)A. when

B. after

C. until

D. that

解析： 考查状语从句。“当他到家时九点了。”