单项选择题
The rules state that vessels may depart from the requirements of the Rules when（）.
A.there are no other vessels around
B.operating in a narrow channel
C.the Master enters it in the ship's log
D.necessary to avoid immediate danger
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The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the starboard side of a vessel（）.
A.ascending the river
B.descending the river
C.crossing the river
D.proceeding towards sea -
单项选择题
The court has the power to（）the time for commencing arbitration proceedings if it is of the opinion that in the circumstances of the case undue hardship would otherwise be caused.
A.pretend
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The approach to the roads and harbor from the（）entails no difficulty.
A.eastern
B.easterly
C.eastward
D.eastwards
