I:
1: a
2: b
3: b
4: d
5: a
6: b
7: c
8: a
II:
1: Minh likes listening to music
2: Chi prefers watching TV to playing sports
3: She goees to school 5 day a week
4: We learned English 3 years ago
III:
a: She finished hight school when she was only 15 years old
b: She won the Nobel Prize for Physics in 1930
IV:
1: worked
2: does Nam play
3: are watching
4: will visit