Read the email below and fill in the blanks with proper prepositions. Referring (1) ____ Contract No. 115, we are sorry to say that the relevant L/C has not arrived yet up (2) ____ the time of writing. This has put us (3 ) ______ great inconvenience as we have already made preparations (4) ____ shipment as contracted. Once a contract is signed, it must be strictly observed. Failure to do so means a breach of contract. It is stipulated (5) _______ the contract that the buyer shall open the covering L/C before September 30, 2015. If the buyer fails to open the L/C as contracted, the seller will have to postpone the shipment. The goods you ordered have been ready (6) ____ shipment. Therefore, please open the relative L/C immediately, which must reach us (7) _____ the first 10 days of October. (8) ____ the event of your once again failing to open the L/C (9) ____ time, we will cancel the order and ask you to refund (10) ____ us the storage charges, labor cost and other charges. You cooperation in this aspect will be appreciated. Lily