She has stopped getting married in a lot of troubles.
She was troubled for a long time and finally did not get married.
I decided to study abroad at which university to study at University A.
Worried about which university to study at, I finally decided to go to A University.
I was lost as to which one to choose, and decided not to buy anything.
Which one to buy, hesitated for a long time, and finally decided not to buy anything.