结构推理 Dear sirs,
   Re: L/C No. 12345
   We thank you very much for your extension of L/C No. 12345, and we are pleased to inform you that we have this clay completed shipment of 1,000 Men's Bicycles in accordance with the stipulations of the captioned L/C, on board S. S "Seagull" sailing for your port on July 12. We confirm our fax of today's date, it reads:
   "L/C NO. 12345 1,000 MEN'S BIKES SHIPPED SEAGULL SAILING JULY 12 LETFER FOLLOWS"
   We are sending you under cover one set of the shipping documents coveting this consignment which comprise:
   1. Our invoice in duplicate
   2. One non-negotiable copy of B/L
   3. Certificate of Quality in duplicate
   4. Packing List in duplicate
   5. Insurance Certificate in duplicate
   We hope that the goods will arrive in good time and prove satisfactory to you and we expect to receive your further orders before long.
【正确答案】敬启者：
   事由：第12345号信用证
   对你方展延第12345号信用证，表示谢意。兹通知你方，按照标题信用证的规定，我方已于今日将1,000辆男式自行车装上“海鸥”轮。该轮定于7月12日起航赴你港。我方确认今天给你方的传真，全文为：
   “你方第12345号信用证的1,000辆男式自行车已装上‘海鸥’轮。该轮定于7月12日起航，详见另函。”
   兹随此信寄上这批货的装运单据一套。计有：
   1．发票一式两份；
   2．不可转让提单副本一份；
   3．品质证明书一式两份；
   4．装箱单一式两份；
   5．保险凭单一式两份。
   希望这批货物及时到达你处，能使你方感到满意。并期待不久收到你方更多的订单
【答案解析】