单项选择题
Manifest and cargo plan are the two most important shipping papers required for（）.
A.provision order B.discharging planning C.annual repair D.outward clearance
单项选择题 In comparison to electric power，hydraulic power for jacking systems has the advantage of（）.
单项选择题 I’ll have the damaged parts repaired in Hongkong and send you in due course the amount of expenses（）.
单项选择题 If your radiotelephone fails while underway,（）.
