If you are free to walk through out city, please ________ us.A drop in B drop in at C. drop in on
—______ 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.