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 saw you. 5. english (become) one of the most popular courses at the university. 6. my english really (improve) since i took private lessons. 7. i think (see) that movie before. 8. he never (travel) by 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 (be) to france? - i (be) to france three times. 15. james (not finish) his homework yet. 16. bill not (arrive) yet. 17. the rain (not stop). 18. mary (love) chocolate since she was a little girl. 19. she (be) in england for six months.
