-What's the matter with you?you look sad.-Oh,as a matter of fact,I _of my friends back home.答案是was just thinking.为什么不能选have just been thinking?
问题描述:
-What's the matter with you?you look sad.-Oh,as a matter of fact,I _of my friends back home.
答案是was just thinking.
为什么不能选have just been thinking?
答