单项选择题
At sea, much of the sailor’s time is spent （）the ship and keeping her equipment in good condition.
A.to maintain B.maintaining C.maintenance D.maintain
单项选择题 （）is in charge of the common tools of the deck department.
单项选择题 （）are not included in the common tools.
单项选择题 （）is the officer responsible for the overall maintenance of deck department.
