III.
1. information
2. surprisingly
3. apologize
4. homeless
5. poverty
IV.
1. B
2. C
3. B
4. C
5. A

V.
1.D.An accidental invention
2.B.1877
3.A
4.D
5.C

VI.
1.He worked hard; however, he was not successful in the contest
2.Minh spends 2 hours doing his homework everyday
3.Because it rained heavily, we were late for school
4.She said she was working in a restaurant, and didn't care much for it .
5.I haven't spoken to her for 2 years

* Còn lại:
vII.
1. Hung would go to school on time if she had alarm clock
2. I love wearing cotton because it is very strong and doesn't wear out
3. I suggest putting garbage bins around the schoolyard to prevent lazy students from throwing trash
4. Proessor nelson who wass a famous scientist spent most time on studying about earthquake
5. It's necessary to protect the enviroment