UNIT II — Arrange the sentences to form the best-ordered paragraph.
(i) Of course, modern postal services now are much more sophisticated and faster, relying as they do on motor vehicles and planes.
(ii) Indeed, the ancient Egyptians had a system for sending letters from about 2000 BC, as did the Zhou dynasty in China a thousand years later.
(iii) Letters were, and are, sent by some form of postal service, the history of which goes back a long way.
(iv) For centuries, the only form of written correspondence was the letter.