-- Look at the boy running on the ground. Is it David?-- It _______ be him. I saw him go to the teacher’s office just now.
—______ do you go to the school library? —Often. I like reading there.
—Where is Jenny? —She ______ TV at home.
I like basketball and I often play ______ basketball after school.
We don’t need a lot of friends _____ they are good.
Jim is very_____ because he doesn’t like exercise.