2 Match the rules with the sentences from 1. a We use no article when we talk about things in general. b We use the to talk about a specific person or thing or previously mentioned person or thing. c We use a/an to talk about a singular, countable person or thing for the first time, or to say that the person or thing is one of a number of people or things. d We use the to talk about someone or something that is unique. e We use a/an to say what somebody's profession is.