--“Which class are you in ?”---“I’m in            .”

I think he is a student, ____？

--- 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.

—Lucy hardly goes back to see her parents, _____________?—__________. Instead, she chooses to write to them.

—_________do you write to your parents?—Once a month.