单项选择题
You may（）traffic lane.
A.enter B.enter in C.enter to D.enter into
单项选择题 A vessel may enter a traffic separation zone（）.
单项选择题 A vessel navigate in areas near the termination of traffic separation schemes shall do（）with particular caution.
单项选择题 A vessel not using a traffic separation scheme shall avoid it by as wide a（）as is practicable.
