1. A: May I use your bike?

　　 　 B: ______. I'm going to use it this afternoon.

　　2. A: What's the ______ ______ your watch?

　　 　 　　 B: It's ten to ten.

　　3. A: ______ ______ this table tennis bat?

　　 　 　　 B: ______mine.

　　4. A: ______ ______ he usually go there?

　　 　 　　 B: By motorcycle.

　　5. A: I'm sorry to keep you waiting for a long time.

　　 　 　　 B: It ______ ______.

　　After he left the university, he ______ (send)to work in a modern car factory.

　　What ______ you ______ (do) at eleven last night.

　　Mary told me her parents ______ (visit) China the next month.

　　Alice is busy now. You'd better mop the floor instead of ______.(she)

　　There is only little time left. It's ______ for us to get there in time. (possible)

　　Air pollution is ______ to all the living things. (harm)

　　Tom worked as a ______ at the Children's Restaurant last week.(wait)

　　We must try to fight ______ (pollute) and keep our city clean.

　　Computers are becoming more and more ______ (use) in our life.