Customs clearance in the import-export trade is one of the traditional functions of a freight forwarder.Customs clearance measures mainly include （）。

单项选择题On traffic lanes where demand is strong and plane capacity is limited， the air rates will be （）and vice versa for traffic lanes where supply exceeds demand.

A.low
B.high
C.normal
D.average

单项选择题When one of the original bills of lading being surrendered to the carrier， the others become （）.

A.invalid
B.valid
C.clean
D.dirty

单项选择题The services that a freight forwarder renders may often range from routine and basic tasks such as（）or customs clearance to a comprehensive package of services.

A.the providing of services
B.the utilizing of services
C.the booking of space
D.the loading and unloading

单项选择题The（）may examine or re-examine the goods or take samples from them straightaway in the absence of the consignee or the consignor whenever it considers this necessary.

A.Customs
B.The ministry of commerce
C.The state council
D.the commodity inspection institution

单项选择题（） is the party which applies to the bank for the opening of a letter of credit.

A.A bank in the seller′s country
B.A bank in the buyer′s country
C.An exporter
D.An applicant