单项选择题
----How much cable is on deck ? ----4（）on deck..
A.cable B.shackles C.chain D.A+B+C
单项选择题 After seeing that the gears are free to engage ,put the windlass（） .
单项选择题 Before going to the forecastle, ask the engine room for （） on deck .
单项选择题 （）is fouling.
