Fill in the blanks with the correct preposition. Most teenagers are sesitive ............................ remaks about their appearance

I. Fill in the blanks with the correct preposition
  1. Most teenagers are sesitive ............................ remaks about their appearance.
  2. Michael has a Master's degree .......................... engineering.
  3. How long do you think it'll take David to fully recover ...................... his heart operation.
  4. Sarah has a innate talent ..................... painting.
  5. You know that you can always rely ............................ me if you have any financial problems.