Исправьте предложения, в которых допу-щены ошибки:

a) I'm busier than my little sister. b) London is more old than New York. c) It's the most sharp pencil I have. d) Do you know the shortest way to the station? e) This exercise is more difficult than that one. f) Be activer at your lessons, please. g) She is the most pretty girl I've ever known. h) The boy is as taller as his father. i) He makes more mistakes than you do. j) Baseball is the popularest summer sport in America. k) Yesterday he started to feel more bad. l) He said that money was the most important to him.