5) explain the use of the articles in the following sentences. 1) their flat is on the fifth floor. 2) she went to the market in the morning. 3) a nurse takes care of sick people. 4) i’d like to learn to play the guitar. 5) his uncle is a pilot. 6) we have got a nice cottage-house. 7) he is the strongest boy in our class. 8) this girl is a pupil. 9) you bought two tickets to the theatre yesterday. 10) this picture is the most beautiful one i have ever seen.