Раскройте скобки, поставьте глагол в present perfect. 1. our son (learn) how to read. 2. doctors ( cure) many deadly diseases. 3. scientists ( split) the atom. 4. you (grow) since the last time i sawyou. 5. english (become) one of the most popular courses at the university. 6. му english reatly (improve) since i took private lessons. 7. i think i (see) that movie before. 8. не never (travel) bу train. 9. joan (learn) two foreign languages. 10. you (meet) him? - no, i never (meet) him. 11. you ( see) that movie? - i ( see) that movie twenty times. 12. i think i (meet) him once before. 13. people (travel) to the moon. 14. you (bе) to france? - i (bе) to france three times. 15. james (not finish) his homeworkyet. 16. bill not (arrive)yet. 1 7. the rain ( not stop ). 18. mary (love) chocolate since she was а little girl. 19. she (bе) in england for six months