单项选择题
The purpose of the GMDSS is to（）safety of life and property at sea all over the world.
A.promote B.improve C.guarantee D.both A and B
单项选择题 The first communication satellite was used for the purpose of（）.
单项选择题 A sailor on board（）from appendicitis and required operation immediately.
单项选择题 The foreign seafarers said goodbye to us and looked forward to（）each other soon.
