When I met him the other day，it was the first time we________each other since we were at school.[ ]

A．saw        

B．had seen      

C．were seeing  

D．have seen

铁路货物运输服务订单主要包括货物运输的（）、发站、到站、托运人、收货人、品名、车种、吨数等与运力安排的内容。

A.质量

B.时限

C.数量

D.费用