“Why did you go to the wrong class, Mr. Wang ” “Well, I forget _______ I was supposed to go to.”

The room is empty except for a bookshelf _____ in onecorner

He had the horse _____ all the way. As a result, he fell off the horse and had his arm _____. [ ]

He was very busy yesterday；otherwise，he ______ to the meeting.

When Jay Chou appeared on the stage, all the audience hit their hands together.