Answer:
1. John is sleeping now.
2. Francesca goes to school every day.
3. I have a piano lesson on Tuesday and Friday.
4. Tom and Sarah have just played tennis for 3 hours.
5. Mr and Mrs Clark visit my family every year.
6. My mum isn't cooking at the moment.
7. I have already done my homework.
8. Frank's dad has worked in Austria for a month.
9. We aren't dancing at school today.
10. Boys don't wear pink T-shirts.
11. Our teachers are singing at the moment.
12. We eat our snacks from 9.25 to 9.40 every day.
13. Simon has had football training since Monday.
14. Tony is in his room. He is learning.
15. Kate is at the cinema. She is watching a film.
16. My grandad is in the garden. He is cutting the grass.
17. My grandma is in the living room. She is reading a book.
18. My sister is in the UK. She phones u severy week.
19. We go to the sea every summer.
20. Peter has gone skiing to the Alps since February.
Explanation:
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The correct answers of  the blanks are as follow:
1. John is sleeping now.
2. Francesca goes to school every day.
3. I have a piano lesson on Tuesday and Friday.
4. Tom and Sarah have just played tennis for 3 hours.
5. Mr and Mrs Clark visit my family every year.
6. My mum isn't cooking at the moment.
7. I have already done my homework.
8. Frank's dad has worked in Austria for a month.
9. We aren't dancing at school today.
10. Boys don't wear pink T-shirts.
11. Our teachers are singing at the moment.
12. We eat our snacks from 9.25 to 9.40 every day.
13. Simon has had football training since Monday.
14. Tony is in his room. He is learning.
15. Kate is at the cinema. She is watching a film.
16. My grandad is in the garden. He is the grass.
17. My grandma is in the living room. She is reading a book.
18. My sister is in the UK. She phones use every week.
19. We go to the sea every summer.
20. Peter has gone skiing to the Alps since February.
Grammatical error is a term utilized in prescriptive grammar to portray a case of broken, or dubious use, for example, a ​misplaced modifier or an unseemly action word tense.
Additionally called a use mistake. Contrast syntactic error and accuracy.
For more information about grammatical error, refer the following link:
https://brainly.com/question/857968
