单项选择题

As soon as the ship gets alongside the wharf, you should lower the gangway and put a （）below it.

A. safety net
B. safety belt
C. safety lamp
D. safety device

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单项选择题

A. Noticing rise and fall of the tide.
B. Adjusting the mooring line.
C. Discharging cargoes.
D. Receive visitors

单项选择题

A.around
B.up at
C.at
D.in

单项选择题

A. keep sharp lookout at the forecastle
B. receive visitors
C. expect the agent
D. steering wheel