I didn’t know that he was a cheat, or else I ________________ him.

—______ you pass the examination on the first attempt?—Of course. You know, I have been preparing for it for a long time.

Never _______ forget the days when ______ together with you. 

Let’s clean our classroom, _____?

一What if you_____ to send an essay with your application?一I would have been rejected．