—President Obama has never been to Beijing, ______ he? — He visited the Great Wall on the afternoon of November 18th,2011.

—He’s not married Laura, ____?—____. They will celebrate their one year of marriage this Sunday.

--- She's never spoken to a foreigner, _______? --- Yes. She is active and can speak English freely.

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

---- ________ did you _________ your old newspapers?---- I sold them.