题目内容：
根据下列选项，回答题。A large number of documents are used in the modern international trade such as
marine bill of lading，letter of credit，insurance policy，commercial invoice，packing list，air waybill，certificate of origin，multimodal transport documents，parcel post receipt，rail waybill etc．The1 evidences the contract of carriage of goods by at least two modes of transport．The2 evidences the contract of carriage of goods by air．Unlike B/L，3 evidences the contract of carriage but is not a documents of title and is not negotiable．The document issued by the carrier or his agent to enable the consignee or his forwarding agent to take delivery of the imported cargo from the vessel or port is called 4 ． 5 is a document issued by the authorized body in the exporter’s country stating the country of origin of the goods．
请在1处填上正确答案
参考答案：
答案解析：