1. is => are
2. isn't => aren't
3. is => are
4. have => has
5. higher => higher than
6. is => are
7. shouldn't => should
8. on => off
9. fruit => fruits
10. short => shorter
11. produces => produce
12. much => many
13. many => much
14. lots => lot
15. shouldn't => should
16. must => should
17. on => are
18. population => populations
19, play => playing
20. likes => like
21. is => does
22, visit sometimes=> sometimes visit
23, are => is
24, dogs=> dog
25, many=> much
26, likes=> like
27. more => more
28, plays=> play
29. not=> don't
32, bỏ a
36, musts=>must
37, half a=> a half
38, any=>some
39, bottles=>bottle
40. a little=>little
41. Trang => Trang's
42. isn't=>doesn't
43, many=>much
44, chocolates=>chocolate
45. like=> like to
46, this=>these
47, many=>much
48, bỏ A
50, Is=>Are