单选题 It may interest you to know that there is a good demand here for Chinese Black Tea ____ prices.

单选题 We would not give you any lower price ____ you could place an order for more than 500 tons.

单选题 They found an opportunity to purchase six ____ leather shoes.

单选题 The commodities you offered are ____ line with the business scope of our clients.

单选题 The letter we sent last week is an enquiry ____ color TV sets.

单选题 On the whole, the Christmas sales last year were on a decline. ____, we made a substantial growth in our export.

单选题 While ____ an enquiry, you ought to enquire into quality specification and price etc.

单选题 We thank you for your letter of May 13 and the ____ catalogue.