Skippers must make a report to customs either in person or by telephone if they have any

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Skippers must make a report to customs either in person or by telephone, if they have any duty-free goods on board, or are carrying prohibited goods including animals ______ their port of departure.

A.with regard to

B.ignorant of

C.resistant to

D.irrespective of

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热搜:a是b的充分条件,b是a的必要条件吗