TOEFL essay hints:Topic 4,5,6

4. It has been said, "Not everything that is learned is contained in books. " Compare and contrast knowledge gained from experience with knowledge gained from books. In your opinion, which source is more important? Why?
Comparison and contrast:
From Books:
wide, systematic, scientific but hard to be used and not impressive
From experience: direct, impressive and practical but limited
Choose book:
1) Save time;
2) Avoid making same mistakes.
3) Systematic knowledge.

5. A company has announced that it wishes to build a large factory near your community. Discuss the advantages and disadvantages of this new influence on your community. Do you support or oppose the factory? Explain your position.
Advantages: 1) employment opportunity
2) economic boom
Disadvantages :1) pollution 2) safety problems

6. If you could change one important thing about your hometown, what would you change? Use reasons and specific examples to support your answer
Change pollution:
1) For people's health
2) Attract more investment
3) Living environment