1. B
2. A
3. D
4. C
5. D
6. B
7. C
8. A
9. C
10. A

49. some
50. any
51. many
52. plenty of
53. a little
54. some
55. a few
56. several
57. some
58. a few
59. a little
60. a little 

51. education
52. academy
53. applicants
54. natural
55. encouragement
56. Enrolling
57. explanation
58. fitness
59. recycled
60. citizenship

1. to V
2. to V
3. to V
4. to V
5. V
6. to V

In the eyes of foreigners, Vietnamese people is famous for their friendliness, courage, hardworkingness, hospitality and many things which are concerning economic diplomacy. But when the bad time comes, there's a traditional has helped Vietnam put throughout all the difficulties since Hung Vuong regime. It is solidarity, it always rises among people when bad circumstances happen such as the Covid-19 incident in these days. This is the traditional characteristic of Vietnamese people that I love the most. As the saying goes, who weathers the storm isn't harmed during a difficult period. In 2020, Vietnam was said to be the Asian Miracle - one of four countries that have lowest death rates. Not only thanks to government's rapid isolation of outbreaks (Directive No.16), but also thanks to people's solidarity and voluntary compliance with the new Directive.

1. He said that he would go with her.
2. She said that she couldn't find the bathroom.
3. He said that he was going to the movies that night.
4. He said to me that he would get married if his mother agreed.
5. He says to me that he will get married if his mother agrees.
6. I said to him that his motorcycle had been stolen.
7. He says that the river is rising early that year.
8. The girl said to me that she was going to quit school.
9. She says to me that she'll come as soon as possible.
10. He said that he was leaving for the United States the following day.

2. C
3. C
4. B
5. B
V.
1. B
2. C
3. D
4. D
5. C
VI.
1. A new mall will be built here.
2. I wish I had a laptop at home.
3. Would you mind closing the door?
4. He has been writing the letter for 2 hours.
5. My cousin used to visit me when he lived in Hanoi.
VII.
1. We have lived in this apartment since we were ten years old.
2. It is necessary to protect the environment.

I.
1. D
2. B
3. A
4. C
5. C
II.
1. B
2. B
3. C
4. C
5. D
6. C
7. B
8. C
9. B
10. A
III.
1. city
2. clean
3. live
4. lots
5. are
6. beautiful
7. for
8. sell
IV.
1. B

35. In Sweden, people give a kitten to the bride as a gift on her wedding day.
36. I'm so excited about seeing the new art exhibition this weekend.
37. Lisa is rich enough to buy a big house.
38. She is going to study abroad next year.
39. Peter has short, curly and brown hair.
40. I have to clean my room every week.

19. D
20. C
21. competition (noun)
22. choose (verb)
23. enjoyably (adverb)
24. famous (adj)