6、（ ）means that a charterer hires a ship for a particular ve．

A．Time chartering

B．Ve chartering

C．Bareb chartering

D．A B C

7、（ ）are those covering shipment between direct ports of ling and discharge．

A．Shipped bills of lading

B．Clean bills of lading

C．Straight bills of lading

D．Direct bills of lading

8、When one of the original bills of lading was surrendered to the carrier， the others became（ ）．

A．valid

B．validity

C．invalid

D．A B

9、The l costs of providing the service of transporion consist of fixed costs and（ ）．

A．variable costs

B．administrative costs

C．costs of repairs

D．costs of crew

10、Which of the following trade terms may be used for any mode of transport， including multiml transport．（ ）

A．FOB

B．CIP

C．CIF

D．CFR