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單項(xiàng)選擇題

It is（）to anchor in your present position.

A.danger
B.dangered
C.dangeroused
D.dangerous

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單項(xiàng)選擇題

A long blast to warn the vessels（）vicinity.

A.in
B.on
C.at
D.for

單項(xiàng)選擇題

CO₂ cylinder weighed（）normal weight.

A.light than
B.lighter
C.light
D.lighter than

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