Cargo for （）No.4 is to be loaded first.

单项选择题Bolts, nuts, split pins, hinges, wheels and stoppers should be frequently （）.

A.checked
B.closed
C.removed
D.cleared

单项选择题Before opening and closing the hatches, the spaces around the covers, all the parts and the gears should be （）.

A.cleared
B.checked
C.removed
D.repaired

单项选择题The foreman said three （）would come on board to load cargo.

A.teams
B.parties
C.gangs
D.pairs

单项选择题The wire ropes and blocks, or pulleys, on a ship are called （）.

A.fittings
B.riggings
C.equipment
D.device

单项选择题Each cover consists of two or （）panels.

A.two
B.one
C.more
D.much