Alex, how long ____________ you ___________ in this school?–For three years. I’ll graduate in July.

What _____did you do?[ ]

Will you please go to see the movie Guanyinshan with me tonight? —No, I won’t. I _________it many times.

I don’t know when my son back, but when he back, I’ll call you.

The postman shouted, “Mr Green, here is a letter ______ you.” [ ]