—Does your mother often surf the Internet ?—Yes, ___________ she doesn’t buy any thing on line.
A: Is there a computer in your class? B: ____.
A: ____ boys and girls are there in your class? B: There’re21 boys and20 girls.
—___________? —He is Andy’s father.
Jenny is talking _____ in class. Please tell her to stop.
_____? We’re going sightseeing.