请说明为什么?I saw him ----the room,but I didn't know when he-----.A going into;left there B go into;left there C going into; left to there D go into;left for there

问题描述:

请说明为什么?I saw him ----the room,but I didn't know when he-----.
A going into;left there B go into;left there C going into; left to there D go into;left for there