d worker insisted that he________ old,and________ back to the working post again.

Having finished her project, she was invited by the school ________ to the new students.[ ]

____to be polite

han twenty years____________since hecame to teach in this school, and every student and every parent_____him.

It seems to some experts that 56．com, youku．com and tudou．com _____ 90% of the video market in this area．