III/
1. Wearing casual clothes gives students freedom of choice.
2. Many adults learn English because it is useful for their work.
IV/
1. I have not visited my home village for 2 years.
2. Ha asked Han what language skill she needed to improve.
3. He wishes he could speak English.
4. If you practice speaking English every day, you can improve it.
I./
1. consists of
2. traditional
3. A Could
4. D. from
5. C (because of)
6. C (why)
