— Mary’s father seldom has breakfast at home,          ?—          . He has it on his way to work.

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

---He hasn’t tried Amazon Buffet before, has he?      ---______. He hopes to have a chance to eat there.

There ____more cars now in our country.

---He’s never been to an aquarium.---_______.