帮忙翻译几个有关商务英语的句子，谢谢了~~

1.They have been urging us to open the letter of credit about 2000 dozens of pencils recently.
2.Delivery date closes on day by day, please apply to open the letter of credit as soon as possible.
3.Please notice the relevant letters of credit already opening through Bank of London, we wait for you to deliver goods in time.
4.Because the extra charge that the letter of credit is postponed causing is for your account
5.Advance gradually in time of shipment, it will be deeply grateful that can open the letter of credit in our favor as soon as possible.
6.Please do one's best to drive the letter of credit to at the end of this month rapidly, in order to ship in time.
7.We have already bought this goods from the producer
8.They urge and open a letter of credit immediately within 5 days