如果两台终端直接用电缆相连进行通信，所用电缆应为（）电缆。

Tom is only ______.

I don’t think a _______ boy should be allowed to drive.

A．fourteen-year-old;fourteen-year-old

B．fourteenyearsold;fourteen-year-old

C．fourteenyearsold;fourteen-years-old

D．fourteen-year-old;fourteenyearsold