=>
I/
1. natural
2. exciting
3. ultimate
4. travellers
5. incredible
II/
1. If Minh had time, he would read many English books.
2. My sister is a college student.
3. I don't like people who talk too loudly in public places.
4. What an interesting journey!
5. My brother is fluent in Italian.
6. If you learn more about history and culture, you can become a tour guide.