My uncle brought his girlfriend to ____ my parents’ happy marriage with her own eyes at Christmas that year.

I tried to persuade him to give up the foolish idea, but in ________, and now he begins to regret.

Tom has a (n)      for language，while his sister is a born pianist

 Miss Smith is a friend of________.

It is believed that health problems are closely connected with bad eating habits and a _______ of exercise.