Exercise 1. Guess the meaning of the following words, nay attention to the word-building suffixes -er/-or, -ist, -cian. journalist, designer, sociologist, chemist, biologist, biochemist, dentist, doctor, businessman, farmer, physicist, physician, computer operator, electrician, mechanic, model, actor, ecologist, politician, lecturer, professor, conductor, pilot, geologist, architect, jockey, manager, director, producer, sportsman, footballer, specialist, policeman, musician, pianist, detective, economist, steward, captain, interpreter, engineer, archaeologist, secretary, cook, mathematician, composer