When the old man to walk back to his house,the sun itself behind the mountain. A

When the old man______to walk back to his house,the sun______itself behind the mountain.

A.started;had already hidden

B.had started;had already hidden

C.had started;was hiding

D.was starting;hid

试题答案

A

解析:

时间状语从句用过去时，主句用过去完成时表示动作发生在从句动作之前。