單項(xiàng)選擇題

Vessels are required（）Singapore Port Service when passing the points indicated.

A.communicating with
B.to communicate with
C.be communicated
D.will communicate

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單項(xiàng)選擇題

Vessels are warned（）in this area.

A.to not anchor
B.to anchor not
C.not to anchor
D.not anchor to

單項(xiàng)選擇題

Vessels carrying（）must not willfully wash decks or holds.

A.general cargo
B.steel products
C.harmful cargo
D.machinery

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