Sentence Questions

Hello

I made some sentences, but I am not sure whether they are right or not.>>

If you find something wrong in Grammar or vocabulary, help me check them.>>

Thank you very much.

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1. The more old historical buildings a city preserves, the more advanced and refined civilization a city has. 
 
2. Businessmen take advantage of an advertisement or commercial to coax consumers into digging into their pocket to buy what they don’t truly need.
 
3. Advertisements serve to convey the advancement of a new product, such as a computer or a video player, can improve our lives. 
 
4.  Nowadays, people all over the world are getting to know how to avoid the conflict between different races or nations because they do keep in mind the cost of the World war two.
 
5. A risk-taker can help his company, faced with the crisis of collapse, tide over the difficult times.
 
6. My friend’s perception of political issues really strikes a chord with me.