—_______ do you go to school every day?—By bus.

You look very tired and you must have been preparing for the coming examination yesterday evening, _________ you ?

一Do you have _______pens in the pencil case?一No，I don’t have _______ ．

—Does Bob have vegetables for dinner?—______. But his sister has some carrots.

---John and Tom, you two clean the classroom today, _____? ---But we cleaned it yesterday.