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單項(xiàng)選擇題

Can we change the location for the tung-oil（）that for the gum rosin?

A.by
B.for
C.into
D.with

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單項(xiàng)選擇題

Cargoes which（）an explosive, inflammable, poisonous and corrosive nature are called dangerous goods.

A.is
B.are of
C.is of
D.are

單項(xiàng)選擇題

Collision rules（）apply to all vessels upon the high seas.

A.should
B.must
C.shall
D.have to

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