單項選擇題

This is deck cargo. （）stow it in the holds.

A.Not
B.Notto
C.Don’t
D.Can

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單項選擇題

Before leaving the harbour, all derricks must be （）properly.

A.tightened
B.secured
C.unfastened
D.loaded

單項選擇題

（）operation, any obstacles in the way of hatches must be removed and cleaned.

A.Before
B.During
C.After
D.Within