Fill in the followingblanks with the appropriate prepositions: 1.We have opened the L/C_________ the Bank of China, Shanghai. 2. 90% of the credit amount must be paid________ the presentation of documents. 3. We will draw _______you by our documentary draft ________ sight on collection basis. 4. We have received your L/C No. 5637 established _________ our S/C NO. NH685. 5. Much _______ our regret, you have not accepted our best quotation. 6. If you agree to partial shipments, it would be ________ our mutual benefit. 7. Please ship the goods ________ three equal monthly installments. 8. We assure you ______ our prompt attention to this matter. 9. Payment should be made ________L/C. 10. We feel sorry for the inconvenience caused by our delay _______ delivery. 11.We trust this amendment will meet with your approval and you will fax us_______ that effect without delay.