单项选择题
I can not take any actions to avoid close quarters situation with you，because your navigation lights（）.
A.is not visible B.are not invisible C.are not visible D.can easily be seen
单项选择题 I AM MAKING WATER means（）.
单项选择题 I am maintaining my course and speed. You can（）ahead of me.
单项选择题 I am（）attack of pirates.
