—Do you have a ruler? —Yes, but a short _____.A. it B. ones C. One
There is ____ office on the first floor(一楼).
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’re 21 boys and 20 girls.
—___________? —He is Andy’s father.