单项选择题

At sea, much of the （）time is spent maintaining the ship and her equipment in good condition.

A.officers’
B.engineers’
C.sailors’
D.pursers’

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单项选择题

A.to maintain
B.maintaining
C.maintenance
D.maintain

单项选择题

A. The chief officer
B. The duty sailor
C. The bosun
D. Captain

单项选择题

A. Screwdrivers
B. Derricks
C. Chipping hammers
D. Saws