Answer:
1. I think that the best place to relax is the park.
2. In my opinion, the best age to get married is around 25 - 30 years old.
3. I believe that the best way to stay healthy is to exercise every day.
4. It might be wrong, but the fastest way to become rich is to invest.
5. In my opinion, the easiest way to make money is to work part-time.
6. I must admit, the most delicious Chinese food is fried rice.