—Excuse me, _____ is Dalian from Beijing ?—It’s about three hours by car.

. Reading books is very important for developing the students’ understanding of the world, _______?

He knows so much about the story. He must have read the book, _______?

I told you that you shouldn't waste your time playing the computer games,_____________?

— I wonder ________ you’ll water this kind of flower. ——Every other day.