单项选择题
Before letting the anchor go，you should check that the（）.
A.chain is clear B.anchor is clear of obstructions C.wildcat is disengaged D.All of the above
单项选择题 Anchoring and fishing in this area are（）.
单项选择题 An example of an anchor which has a stock is a（）.
单项选择题 After casting off moorings at a mooring buoy in calm weather，you should（）.
