单项选择题
CO2 cylinder weighed（）normal weight.
A.light than
B.lighter
C.light
D.lighter than
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单项选择题
Vessel（）still to bunker 50 tones of fresh water.
A.have
B.have been
C.has been
D.has -
单项选择题
We（）to let go starboard anchor.
A.is going
B.be going
C.going
D.are going -
单项选择题
（）spirits and tobacco do you have on board?
A.How much
B.How many
C.How long
D.How far
