Mariners are FIRST warned of serious defects or important changes to aids to navigation by means of（）.

Lay days（）to commence after the expiry of a specified time after the giving of the notice of readiness to load or discharge.

A.is
B.are
C.will be
D.shall be

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In the absence of a custom or special contract to the contrary，the Shipowner is not bound to （）the consignees that he is ready to unload on arriving at the port of discharge.

A.notice
B.notify
C.notificate
D.note

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