We ______ be glad if you could send us samples and quotations.

A. shall                              

B. will

C. should                             

D. could

We have received your enquiry of October 15 ______ we learn that you are interested in our black tea.

A. in which                           

B. from which

C. which       

D. at which

We shall appreciate ______ us your most competitive prices.

A. your quoting                       

B. you quoting

C. you to quote    

D. quote

______ your enquiry of 6 September, we are pleased to quote as follows.

A. Replying for                       

B. Replying

C. Replying to      

D. To be replied to

We agree to the amendments to the contract ______ requested in your letter of May 5.

A. as                                 

B. like

C. to be  

D. when