If you ____ the chat room ten minutes ago, you ____ what we were talking about.

On the ground _______ the man, his face as white as a sheet of paper.

—Will you attend the meeting this evening?—But I ________ told anything about it.

Wang, I hear that you ______ along the Mekong River. Have you got everything ready?

--- How I regret making the stupid mistake!--- Yes. I       your doing it another way at that time, but in vain.