Fill in the blanks with appropriate prepositions. Dear Sirs, We are pleased to learn _1_your letter of April 5 _2_ you have decided to _3_ a large _4_ for a number of the items included in our quotation. All the items ordered are _5_ stock except the two dozen cushion covers _6_ pink. Stocks of these _7_ been _8_ out since we quoted for them and the makers informed us that will _9_ another four weeks _10_ they can send replacements. As _11_ stated in your order that delivery _12_ all items _13_ a matter _14_ urgency, we _15_ sending substitued covers which are deep orange in color, identical _16_ design and quality with those ordered. They _17_ good-looking most attractive and very _18_ with our other customers. We hope you will like _19_. But if not,please return them _20_ our expense. Yours truly,