1) ugly - beautiful; busy - quiet; crowded-deserted; polluted - clean.
2) B; D; A; E; C.
3) puzzled; miserable; excited; worried; tired.
4) We went to the cinema last Sunday; She had a cold a week ago; It was a beautiful day yesterday; I saw Carol on the bus last Tuesday; They travelled to London a month ago.
5)Yesterday I went to school; The weather was cold; After classes I played board games with my sister; I did my homework in the afternoon; In the evening I played computer games.
6) 1.C; 2.B; 3.D; 4.A.
Анекдот: -Как прошёл твой первый день в школе?
-Первый? Это значит, что мне завтра придётся обратно туда вернуться?