【单选题】

Dear Mr.Camel{{U}}Your Order No.AU-06-219{{/U}}We ____1____ your Order No.AU-06-219 for our Ganlu black te

A、And we have noticed with interest your ____2____ for a 15% discount.We wish to stress that the price we quoted you is very competitive, compared with quotations from other suppliers. ____3___, we are working on an extremely narrow profit ____4___, so 10% is the most generous ____5____ we can give our customers under the present circumstances.However, ____6____ the solid trading association between our two companies, we are prepared to offer you a special discount of 8% if you increase the quantity of your order to 5,000 pounds. We hope you will take ____7____ of this exceptional proposal, ____8____ remains valid ____9____ the 20th of this month. We are waiting for your ____10____ of our proposal.Yours sincerelyDashun LeeExport Manager
A、on
B．in
C．for
D．until