— Are you pleased with the result of the football match?

— Sure. We have never had a            one.

A．good

B．better

C．bad

D．worse

下面说法中正确的是[ ]

A．两数之和为正，则两数均为正

B．两数之和为负，则两数均为负

C．两数之和为0，则这两数互为相反数

D．两数之和一定大于每一个加数