单项选择题
A.should B.shouldn’t C.must D.can
A little （）may cause great damage or loss.A.careB.carel...
单项选择题A little （）may cause great damage or loss.
A.care B.careless C.carelessness D.careful
Never operate hatch covers when the ship is（）.A. in por...
单项选择题Never operate hatch covers when the ship is（）.
A. in port B. anchoring C. rolling or pitching D. at sea
You are responsible for （）hatches today.A.closeB.toclos...
单项选择题You are responsible for （）hatches today.
A.close B.toclose C.closing D.closed
