Which floor do you live ______ and which flat do you live ______ ?
A: Is the pen on the desk? B: ____.
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.