Написать письмо, не из учебника.не каким либо персонажем, а так как в реальности человеку, ну думаю вы поняли)

Hello Liza,
Greetings from Saint-Petersburg! I`m having the time of my life! I have been to Saint-Petersburg for three weeks.
I`ve seen a lot of attraction and been in Nevsky Prospect. My family and I have been in Hermitage. Together we`ve gone souvenir shopping, seen famous landmarks. Sain-Petersburg is amazing!
See you in three days. Take care!
Love, Sergei.

Дифтерия - это острое инфекционное заболевание, которое, в основном, поражает горло. Симптомами являются боль в горле, лихорадка, головная боль. Есть трудности с глотанием. Появляются беловатые пятна в горле и, если они распространятся на трахею, возникают трудности с дыханием. Ребенок выглядит больным и токсичным. Это заболевание может привести ко многим осложнениям нервов, сердца и почек, а иногда и к экстренной операции (трахеостомия), её, возможно, придется сделать, если горло забивается, и ребенок имеет затрудненное дыхание. Ребенок должен быть госпитализирован в инфекционную больницу на 3-4 недели, и после выздоровления лечится еще дома в течение нескольких недель. Эту болезнь можно предотвратить путем вакцинации детей.

1.He was accused of using "fighting words", which inflamed his audience and resulted in disorder. But his lawyer was sure that the trial judge's decision was improper. 2. Known as Saint Nicholas in Germany, Santa Claus was usually accompanied by Black Peter, an elf, who punished disobedient children. 3. Unemployment and costs have risen to unacceptable levels. 4. If he has his opinions on a subject, he is immovable. 5. She headed back home and left her mission unaccomplished. 6. She is a rather distrustful person to strangers. 7. It was an unmistakable step of his: he had won. 8. It was irrational to react in that manner. 9. Division by 0 is not defined and therefore is an inadmissible operation. 10. It is illegal to drive while intoxicated. 11. It was immodest of them to say that. 12. He had made progress that was previously unachievable. 13. It would be inaccurate to say that she has been dismissed. 14. They liked to read about demons, ghosts, witches, and other immaterial and unnatural agents. 15. I won't take it. Your data are unmatched. 16. These unmapped deposits made him a wealthy person. 17. He felt a growing number satisfaction with himself and his position. 18. It is a non alcoholic drink, you can give it to Pete. 19. You were inattentive at the lecture, that's why you didn't understand anything. 20. The Great Himalayan region is one of the few remaining isolated and inaccessible areas in the world today.