— ____ is your mother?— She is in the kitchen.

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

—What’s wrong with my computer, Jack?—Let me have a check. OK, it works now.—You mean, nothing wrong with it, ________ ?

Mary: This handbag isn’t yours, is it?Joan: __________.

—Would you mind not playing soccer in the street? —___________. We’ll go and play in the park.