4. Correct the mistakes. 1. Spring are a nice season. 2. Let's to go to the cinema. 3. We often see an umbrellas in the hall. 4. There is an university in Moscow. 5. My friend Mary sleeps often till noon on Sundays. 6. John and Tom is at home. 7. We all are hungry after the walk. 8. I have to go to a doctor sometimes. 9. You can speak Chinese or English? 10. She is sorry, doesn't she? 11. Whose are that cars? 12. They must know this story, don't they? 13. Why you tell me about Kitty? 14. Who are at the meeting? 15. There is an ice in the glass. 16. Put a few sugar in my cup, please. 17. What are in the box? 18. What are this girls? 19. Are there any snow on the ground? 20. There aren't much students in the room. 21. I have many homework today. 22. Nick and Sue has 2 children. 23. We grow in same family. 24. It is such difficult task. 25. You always find the such interesting book. 26. Take my dress, your is dirty. 27. Theirs voyage was wonderful. 28. I am not good today. 29. I don't know nobody in this class. 30. Bring me the others books. 31. There is no a bridge across the river. 32. Which of the boys play baseball? 33. They haven't yet came to me.

Решение:

1. Spring is a nice season. (Spring - ед.ч.)
2. Let's go to the cinema. (После 'Let's' идет инфинитив без 'to')
3. We often see umbrellas in the hall. ('an' перед гласной, 'umbrellas' - мн.ч., поэтому 'an' не нужно)
4. There is a university in Moscow. ('university' начинается с согласного звука 'y', поэтому артикль 'a')
5. My friend Mary often sleeps till noon on Sundays. (Слово 'often' обычно ставится перед глаголом)
6. John and Tom are at home. (John and Tom - мн.ч.)
7. We all are hungry after the walk. (We - мн.ч.)
8. I have to go to a doctor sometimes. (Already correct.)
9. Can you speak Chinese or English? (Вопрос о способности использовать модальный глагол 'can')
10. She is sorry, isn't she? (Вопрос-хвостик для утвердительного предложения: She is sorry -> isn't she?)
11. Whose are those cars? (Указательное местоимение 'those' для множественного числа)
12. They must know this story, mustn't they? (Вопрос-хвостик для модального глагола: They must know -> mustn't they?)
13. Why do you tell me about Kitty? (В вопросах используется вспомогательный глагол 'do')
14. Who is at the meeting? (Who - ед.ч.)
15. There is ice in the glass. ('ice' - неисчисляемое, поэтому без артикля 'an')
16. Put some sugar in my cup, please. ('sugar' - неисчисляемое, поэтому 'some' вместо 'a few')
17. What is in the box? (What - ед.ч.)
18. What are these girls? (Указательное местоимение 'these' для множественного числа)
19. Is there any snow on the ground? (В вопросах и отрицаниях используется 'any' вместо 'some')
20. There aren't many students in the room. ('students' - исчисляемое, поэтому 'many' вместо 'much')
21. I have a lot of homework today. ('homework' - неисчисляемое, поэтому 'a lot of' вместо 'many')
22. Nick and Sue have 2 children. (Nick and Sue - мн.ч.)
23. We grow in the same family. (Перед 'same' нужен артикль 'the')
24. It is a difficult task. (Перед 'difficult task' нужен артикль 'a')
25. You always find an interesting book. (Перед 'interesting' нужен артикль 'an', так как начинается с гласной)
26. Take my dress, it is dirty. (Замена 'your' на 'it' для указания на платье)
27. Their voyage was wonderful. (Already correct.)
28. I am not good today. (Already correct.)
29. I don't know anybody in this class. (После отрицания 'don't know' используется 'anybody' вместо 'nobody')
30. Bring me the other books. ('other' без 's', если речь идет о конкретных, оставшихся книгах)
31. There is no bridge across the river. (Перед 'bridge' нужен артикль 'a' или 'no' как замена артикля)
32. Which of the boys plays baseball? (Which - ед.ч., поэтому глагол 'plays')
33. They haven't come to me yet. (Слово 'yet' обычно ставится в конце отрицательных предложений или вопросов в Present Perfect)

Ответ: 1. is; 2. go; 3. see umbrellas; 4. is a; 5. often sleeps; 6. are; 7. are; 8. have; 9. Can you speak; 10. isn't she; 11. those; 12. mustn't they; 13. do you tell; 14. is; 15. ice; 16. some; 17. is; 18. these; 19. Is there any; 20. many; 21. a lot of; 22. have; 23. the same; 24. a; 25. an; 26. it; 27. (no mistake); 28. (no mistake); 29. anybody; 30. other; 31. a bridge / no bridge; 32. plays; 33. yet