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36. Bob has never seen this movie before.
39 Have you received any letter from your parents yet?
43. People plant trees in public areas.
44. I didn't go to school because it rained heavily yesterday.
45. How long have you studied at school?
31. They give care and comfort to disadvantaged or handicapped children and help them to overcome their difficulties.
32. The people who have suffered badly in wars or natural disasters.
33. In remote or mountainous areas.
34. Because they are young enough to understand the problems of younger boys and girls.
35. They believe that some of the happiest people in the world are those who help to bring happiness to the others.
III. Put the verd in brackets in either past simple or present perfect.
16. They (buy )__________bought______ a new house last week.
17. I (buy )______bought___________ a new television.
18. My morther (watch )______has watched___________. Don't burn several times.
19. I (watch )______watched___________. Iron man last night.
20. My father (meet )________has met_________ my teacher before.
21. My brother (meet )_______met__________ his old friend yesterday.
22. He (go )________went_________ to Paris last summer.
23. She (never, go )_________________ to Paris.
24. Phong (finish )________has finished_________ his homework recently.
25. My friend (finish )____finished_____________ his essay three days ago.