There has been a great increase in bicycle sales this year________?

—_______ does it take to walk from your home to your school?— Fifteen minutes. 

—— ___________ do you have this kind of match? —— Once a year.

I don’t think Mary is angry with you,________?

—I would like to pick up your sister for you. But I don’t know her. _____?—A middle-aged woman with a round face, wearing a red blouse.