单项选择题
A.secured B.secures C.securing D.securely
Slack （）head line.A.downB.awayC.forD.on
单项选择题Slack （）head line.
A.down B.away C.for D.on
（）attention to the safety of the gangway.A.PaidB.Paying...
单项选择题（）attention to the safety of the gangway.
A.Paid B.Paying C.Pay
—Where is the（）? —He’s in his cabin.A.deckB.bridgeC.cab...
—Where is the（）? —He’s in his cabin.
A.deck B.bridge C.cabin D.captain
