Трансформируйте предложения в страдательный залог 1. Mr. Kelly brought up the

1. Mr. Kelly brought up  the matter of guarantee period. The matter of guarantee period was brought up (Past Simple Passive) by Mr. Kelly. 2. We have already informed them about the prices and terms of payment. They have already been informed (Present Perfect Passive) about the prices and terms of payment. 3. With the development of economic ties among the countries people do a great volume of business by mail.  With the development of economic ties among the countries a great volume of business is done (Present Simple Passive) by mail.