I think teenagers should be allowed to go to meet internet friends alone.—_________. It’s too dangerous.
I’m sleepy.I prefer _____at home to going out for a walk.
When I was walking past his room yesterday evening.I heard him ____the piano .
Dad ,you have worked for three hours .Stop ____and have a vest, please .
----Why don’t you go out to play , Rose? ----I’m afraid I can’t .I have much homework ____.
In the library , you keep quiet.