— Have you _______ read this story before? — Yes. I’ve _______ read it.

hey, Alice. You___ on the phone a moment ago. But you weren’t here and I took a message for you.  Oh? I was in the library.

A number of students _______ reading in the classroom now.

I'm sorry I can't stop           with you. I have much work to do.

The students _______ their homework carefully when the teacher walked into the classroom quietly.