6．(2016·呼和浩特)He is very rich but that day he bought ________ bike to save money for the poor children.
A．an expensive B．a more expensive
C．the more cheaper D．the cheapest
7．(2016·鄂州)—Did John get Number 1 in the math exam?
—Yes, no one did so ________ as him.
A．good B．well
C．better D．best
