A、onB、ofC、toD、atPlease send us three copies of your lat……

单项选择题Your samples should give us some idea of the colors and quality () the products

单项选择题Please tell us how long this price list () valid.

单项选择题As the brochures you sent us were() damaged in the mail, we would like you to mail us some more.

单项选择题The above information is given confidentially and without responsibility () our part.

单项选择题What quantities of the specified item can you regularly deliver ()short notice?

单项选择题We request you to see to it that L C is opened by cable ()order is placed with us.

单项选择题Please open the Letter of Credit promptly at the contract price, () we cannot apply for export licence

单项选择题We trust that you will be able to accept our offer, which shal() against reply by cable

单项选择题Being specialized () the export of Chinese Arts and Crafts goods,we express our desire to trade with you in this line.

单项选择题We hope that we may have an opportunity of cooperating with you() your business extension.

单项选择题We are () to understand that you are potential buyers of Chinese.

单项选择题By () billy we have learned that you would like to establish business relations with us

单项选择题The purpose () this letter is to inform. you ()the important meeting.

单项选择题Much () our regret, we cannot ship the goods within the time limit of the L C owing to the unforeseen difficulties on the part of mill.

单项选择题we expect to travel from Beijing to Shanghai () Tianjin