12. We are writing to confirm _______ from you the following products.
A. being purchased
B. to have purchased
C. to purchase
D. having purchased
13. I would appreciate
_______ me an up-to-date price list for your building materials.
A. it if you would send
B. that you would send
C. you send
D. it sending
14. We will proceed _______ your order as soon as we receive your instructions.
A. in
B. for
C. with
D. to
15. They have _______ a price which we think will be acceptable _______ you.
A. bided. . . to
B. bid. . . to
C. bidden. . . by
D. bid. . . with
