My aunt is a writer. She ______ more than ten books since 1980.

What do you think of the EXPO 2010？— It’s great， of course. people are going to Shanghai for the EXPO 2010.

He is _______ small _______ to school.[ ]

Let’s sell these watches _________ them.[ ]

Let’s go fishing if itthis weekend.—But nobody knows if it .[ ]