一小球沿斜面滑下，依次经过A、B、C三点，已知AB=6m，CB=10m，小球经过AB和BC两段所用的时间均为2s；则小球在经过A、B、C三点的速度大小分别为（　　）

A．2m/s　3m/s　4m/s

B．2m/s　4m/s　6m/s

C．3m/s　4m/s　5m/s

D．3m/s　5m/s　6m/s

I think basketball is _______．I like to watch it.

A．boring

B．bored

C．exciting

D．excited