标准要求以下记录应与保持（）。
A.内部沟通记录
B.外部沟通记录
C.OPRP监视记录
D.CCP监控记录
参考答案：B, C, D
— Should I talk in English or French?
— Do as you _________ . We understand both.
A．think
B．please
C．care
D．feel
（）is the most flexible mode of all the transport modes.
A.Aircraft
B.Ship
C.Train
D.Motor carrier
