Are the books ________? — No, they belong to ________.

Why do English people talk so often about the weather when they start a talk? — Because the weather is a(n) ________ topic (话题).

Would you like to watch the three-D film Titanic with me?–Certainly. I don’t mind seeing it again although I _____ it twice.

There are many hills in the country. A train usually goes ______ tunnels.[ ]

When can I see the doctor, madam?— Let me see. Sorry, you ___________ your turn, so you will have to wait again.