—Do you know _____ the CD yesterday?  

—Sorry, I don't know.  [ ]

A. how much he paid for

B. how much he will pay for

C. how much did he pay for

D. how much will he pay for

客车运行作业计划是将( )在时间上和岗位上的具体落实。

A．运输效率计划
B．企业经营计划
C．运输生产计划
D．车辆维修计划