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單項選擇題

Radio beacon service of John Light（）discontinued.

A.has been
B.have been
C.have
D.has

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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

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