1. _____ is more commonly used in British English and 2______ in US English. However, British English also uses the noun 3_____ quite often. The official name of the 4_____ organisation is the Royal Mail. The system for sending messages by plane is called 5____. And we use the expression 6_____ for letters, packages etc that go by road, rail or sea. The informal expression 7_____ ____ is used by people who use e-mail to describe the system of sending letters by 8_____. a) snail mail. b) mail. c) surface mail. d) postal. e) air mail. f) post. g) ordinary. h) mail.