1. I agree that parents are the best teachers.
2. I believe that the television has reduced the communication among family members.
3. I am doubt that I can make such a important decision without parent's advice.
-> I doubt if I would make such an important decision without parents' advice.
4. I will discuss what has helped helps people to live longer.
5. He will like either what I most like about our town.
-> He would like what I like most about my town.
6. Before we build the new theater, we should know about how it affects the local economy.
7. You maybe wonder if who your roommate is.
-> You may wonder who your roommate is going to be.
8. What a person did his/her best is more important than wining or losing.
-> How hard someone tries is ~
9. Many people study history while a few recognize its value.
-> While many people study history, a few recognize its value.
10. If I make a choice, I would rather work at a high - paying job with long hours.
-> If I had to choose, I'd rather ~
11. Although computer makes our life much easier, there is a drawback as well.
-> Although computers have made our lives easier, there are some drawbacks as well.
12. When I am stressed, I go somewhere for being to be alone.
13. Living in city is often stressful but it has benefits.
-> While living in the city can often be stressful, there are also many benefits.
14. The fact that someone is rich doesn't make him successful.
15. It depends on your personality how you are learning.
-> How you learn depends on what kind of person you are.