All the passengers and suitcases      were still waiting on the broken-down old bus had to be transferred to another long-distance bus.

A．they

B．who

C．that

D．which

为加强对未成年人健康成长的保护，我国《未成年人保护法》规定：禁止用工单位非法招用               的未成年人。  [ ]

A、已满18 周岁    

B、已满16 周岁  

C、未满16 周岁  

D、未满14 周岁