单项选择题
Saving or reducing expenditure in business is（）
A.Save money B.Increase cost C.Cost planning D.Cost control
单项选择题 Re-handling can save cost and improve service, Is it true or not? （）
单项选择题 Where is the rail service better than U.S? （）
单项选择题 If you make different trade in different countries, you must take different transport modes? （）
