We can hardly tell what life without the Internet will be like in the future, _________?

—Mary, could you tell me if your mother ________ our school sports meeting tomorrow?　　—I think she will come to school if she _________ free.　　

She feels unhappy, _____?

—He’s never seen the film Rio2 (里约大冒险2) before, _________ he?—_________. He went to see it last week.

There is little milk left in the bottle,______?