Нужно , 20 !
замените модальные глаголы соответствующими эквивалентами в и будущем времени. переведите полученные предложения на язык.
1. the scientists can test their new apparatus in the laboratory.
2. after finishing the experiment scientists must discuss the results.
3. our age may be called the age of atom.
14. Mark's mother watches as he writes an essay. 15. Mark writes an essay for two hours. 16. Mark wrote for five essays in this month. 17. Last year Mark also wrote essays. 18. Mark wrote an essay when he arrived. 19. Mark wrote an essay for a long time, when they came to his friends. 20. Mark has written an essay before his parents arrived. 21. By the end of the month, Mark wrote five works. 22. While the mother brand will plant the rose, he will write an essay. 23. By the time the parents of Mark will come home, he will write a composition for two hours.