Here are the correct prepositions for each sentence:

10. I talked **to** her about this matter.
11. My husband specializes **in** computer software.
12. The course in this school appeals **to** me the most.
13. He’s always boasting **about** the one time he was on TV!
14. Poor Linda! She suffers **from** migraine headaches.
15. How are you feeling? Have you recovered **from** your operation yet?

Feel free to ask if you need further assistance!