I.
1D 2B 3D 4A 5A
II.
1C 2C 3D 4B 5A
III.
1A 2C 3A 4B 5D 6C 7D 8D 9C 10C
IV.
1. making -> made
2. polluted -> unpolluted
3. containing -> contained
4. either -> neither
5. your -> yours
6. does not try -> try
7. most us -> most of us
8. with -> from
9. for -> in
10. (mình nghĩ sai ở phần bị mất)