20. B 21. A 22. C.-. 23. B 24. D 25. B 26. C 27. B
*Writing
39. Took
40. => My son is keen on reading books than playing computer games.
41. => Tennis player Novak Djokovic is skillful.
42. I went to Da Nang last summer vacation.
43. All children shouldn't spend much time on these video games.
44. Martin got a bad toothache because he forgot to brush his teeth.