单项选择题
I hereby request permission（）the ship’s main engine for routine maintenance.
A.immobilize B.to immobilize C.immobilization D.immobilizing
单项选择题 I haven’t seen the Harbor Officer（）.
单项选择题 I have steerage way. It is said that（）.
单项选择题 I have pleasure in informing you that all safety equipment is in（）working order.
