單項選擇題

Ships’ masters are requested to ensure that during their call at this port , all discharging outlets are（）.

A.blockaded
B.opened
C.closed
D.enclosed

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單項選擇題

Some sea water came into the wheel house during the voyage due to（）the window thereof.

A.not close
B.not closing
C.we didn't close
D.not to be closed

單項選擇題

The antennas of the trucks on deck are not fitted（）.

A.in
B.on
C.out
D.with