Tony often goes to the park, _____?

Few people knew how to use the Internet in the past,_____?

There are few students in the park, _________?

--- Liu Tao has never read the book The Adventure of Tom Sawyer , _________ he?--- _________. He told me it's very interesting. He'd like to read it again.

— There is little water left in the bottle, ______? — No, we need to buy some more before we run out of it.