IX.
40. Although the weather was bad, they ha a wonderful holiday
41. A new mall will be built here
42. Mai spent 5 hours going to the seaside last week
43. They have lived in this village for 20 years
44. Lam was too surprised to say a word
IX.
45. I haven't met Mai since last Monday
46. If it doesn't rain tomorrow, i will go camping with my friends
47. We used to wear uniforms when we were at school
X.
48. His parents were happy because he got a job
49. Tuan has taken part in different charity activities
50. You must get a letter from a doctor that shows you are in perfect health
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4. Their work will be finished tomorrow
5. Mary asked Minh why he learnt English
IX.
1. Energy from the sun is cheap and clean
2. Mark Twain was one of the most famous writers in America
3. I have lost the novel that you gave me on my birthday
4. I am writing to complain about the shoes i bought at your shop last week
5. Many children spend lots of time surfing the internet every day
