单项选择题
A.taking the place of the radio system B.introducing a new life-saving system C.saving the vessels in distress D.improving the communication on land
A sailor on board（）from appendicitis and required opera...
单项选择题A sailor on board（）from appendicitis and required operation immediately.
A.was suffering B.is suffering C.has suffered D.has been suffering
The foreign seafarers said goodbye to us and looked for...
单项选择题The foreign seafarers said goodbye to us and looked forward to（）each other soon.
A.see B.seeing C.be seen D.being seen
In the IMO SMCP the situations（）phrases using the work ...
单项选择题In the IMO SMCP the situations（）phrases using the work “can” appear it clear whether a possibility is referred to.
A.where B.when C.after D.unless
