We        the opportunity to go to France, had it not been for Mary’s help.

A．would have lost

B．should lose

C．might lose

D．must have lost

美国视频电子标准协会定义了一个VGA扩展集，将显示方式标准化，这称为著名的( )显示方式。

A．AVGA

B．SVGA

C．VESA

D．EGA