函数y=2x²与y=-2x²的图象形状______，开口方向______，y=2x²开口向______，y=-2x²开口向______，它们的对称轴为______，由这两个图象的特征，我们可知图象形状与______有关．

Mr Black was driving fast to take his wife to a nearby hospital because their baby was ________.

A．on its way

B．in the way

C．by the way 　

D．out of the way