Which of the following may be the disadvantages of road transport？（）

单项选择题The （）is the consideration which the insurers receive from the assured in exchange for their undertaking to pay the sum insured in the event insured against.

A.insurance amount
B.insurance premium
C.amount of compensation
D.salvage charges

多项选择题Liquid goods are transported by road in （）.

A.tank trucks
B.tanker lorries
C.road-tankers
D.special tank-containers for intermodal transport

单项选择题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

单项选择题（） constitutes the principal mode of international transport and carries about 90 percent of international trade in terms of volume.

A.Rail/road transport
B.Airfreight
C.Multimodal transport
D.Marine cargo transportation

单项选择题In practice， a set of（）original bills of lading is the most common.

A.one
B.two
C.three
D.four