单项选择题
The anchor is（）(抓牢) ,four shackles in water.
A.hold B.held C.holding D.to hold
单项选择题 Take to the forecastle deck an （）(油壶)and a hammer.
单项选择题 Release the （）(制动器)when letting go the anchor.
单项选择题 Weigh anchor and（）(留)one shackle in water.
