Your immediate reply should reach us not later（）the end of this month.

We hope this unfortunate incident wil not afect the friendly relations（）us.

While （） an enquiry, you ought to enquire into quality specification and price etc.

Our foreign trade policy is based（）equality nad mutual benefit.

As we are heavily committed,we are sorry that we are not in a（）to accept new orders.

We are glad to enter （） business relations with your corporation.

We have established an irrevocable letter of credit（）your favour with the Bank of China,Guandong．

We are glad that in the past few years,（）joint efforts,have greatly promoted both business and friendship.

We hereby register a claim with you（）the basis of here,we can obtain a number of orders for you.

We trust the mentioned shipment will reach you（）sound condition.