For transport of hazardous materials， truckers need a licence， which usually requires them to pass an exam.

Since the freight payments are taken care of by the freight forwarder， the carrier doesn′t have to take any （）.

A.benefit
B.responsibility
C.risk
D.advantage

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Currently， different types of multimodal transport operations involving different combinations are taking place.（）transport does not refer to multimodal transport.

A.Sea/air
B.Sea/road
C.Sea/rail
D.Sea/sea

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