— Dad, would you please drive __________?— No hurry .We have enough time before the plane takes off.

—Don’t walk so fast. You must cross the road as _________as possible. —OK.I will.

—        is the ticket of the museum for children? — Well, it’s free for everyone.

My mother is working so        that she can       have any time for me．

—Have you ___________ been to Beijing? —Yes. But only once.