––Would you mind _______ the music? Your grandpa is sleeping.––Sorry. I’ll do it right away.
—________free education,the poor children in my hometown can go back to school. —So can the children in my hometown.
—Are you free now? —No.I have so many chores________today.
—Most paper is made________wood. —Yeah.But most books are made________paper.
Many overseas Chinese look forward to________more about their roots in the summer camp.
—Where did you get these old doors? —From the old houses which were________by the workers.