单项选择题
A.reporting B.report C.reports D.reported
Danger area （）.A.securedB.securesC.securingD.securely
单项选择题Danger area （）.
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
