The port clearance for a ship should be granted（）the completion of loading or discharging in the port.<br>A:before<br>B:when<br>C:after<br>D:during

The port clearance for a ship should be granted（）the completion of loading or discharging in the port.
A:before
B:when
C:after
D:during

出自：海船船员证

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