His sister's never been to the Summer Palace, _______?

— Tom’s never done extra work for his class, _______he?—_______. He is the laziest boy in his class.

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

— She likes pop music, _______ she?        — Yes, she likes it very much.

— Your parents have never learned English, _____?— Yes, they learned a little.