Tìm lỗi sai và sửa: Peter plays the piano better I can. Mary looks more prettier than she used to be. Peter can play table tennis better more than I can. She is the most clever in our class

1. peter plays the piano better i can
2. mary looks more prettier than she used to be
3. peter can play table tennis better more than i can
4. she is the most clever in our class
5. this car is more economical as that one
6. your computer works fast than mine
7. the problem seems to be more serious that we thought
8. his father and he can run so fast as i do
9. this machine is not so modern than that one
10. this film is more interesting the one we saw last week
11. his old house in the countryside is the smaller than his new one in the city
12. " what is the most long river in the world ?" askeg the teacher
13. that is the more boring film i have ever seen
14 .she's as good at tennis so her friends are
15. his hand is so steady as a rock
16. she wrote a 250 - word letter to her friend , who is more friendlier than her
17. the dictionary wasn't as helpful than i had hoped
18. a new house is much most expensive than an old one
19. summer nights in cairo are much more warmer than in london
20. he has been working in this school longer that you