for or of ?

Can you highlight the correct options for the question above? I looked up all the words, but the dictionary doesn't give me the answers, so I am confused by this usage, please help me on this.

Thank you very much!

Haohaoxuexi wrote:

Hi teachers: how to add a preposition after the noun, can u explain a bit when I need to for or of? Can you give me the template for/of  a resume?   This is the template for/of a  resume. What is the price for/of this T-shirt?            The price for/of this T-shirt is 100$. He is the sponsor of/for this event.          He wants to be a sponsor of/for this event. He is a volunteer in/of/for this event.       He wants to become a voluteer in/of /for the Olympics. He has much knowledge of/on/in the computer. What is your understanding of/on this matter? What is your perception of/on this matter?                             Thanks a lot! A volunteer in the event would be a contestant rather than a staffer. Concerning the "sponsor" example, I believe both are common, with a shade of difference in meaning, but I can't seem to get a handle on it right now. Your teacher probably wants "of." Concerning the "understanding" example, I'm sure your teacher wants "of" , but I also hear the other choice, as in "what's your take on this matter?"  take = understanding    Perhaps it's a colloquial meaning, such as "I thought we had an understanding on this!" (an agreement) Some of these are really difficult; I don't envy your teacher.  Common usages often corrupt the pure meanings of the nouns so that an alternate meaning seems to call for an alternate preposition.  If you said, "What's your opinion of/on this matter?," and it's a controversial issue, your opinion on it could be, "I'm against it."  Your opinion of the issue could be, "I think it's stupid."  I don't think you can say that a given noun always takes the same preposition. I believe you can change the preposition to show which meaning you intend. Regards,   - A.