1.Duong had lots of money but she lost it all when her business failed.

=> Duong used to have lots of money.

 2. My brother likes romantic music now, although he wasn’t keen on it he was

younger.

=> My brother didn’t use to like classical music when he was younger.

3. Jin seem to have lost interest in herhobbies.

=> Jin used to interested in her hobbies

 4. Cuong gave up smoking 5 years ago.

=> Cuong used to smoke 5 years ago.

 5. My mother lived in Danang when she was young.

=> My mother used to live in Danang when she was young.

6. Quynh was my best friend, but we aren’t friends any more.

=> Quynh used to be my best friend.

 7. When Hungwas young, he was a national football champion.

=> Hungwas used to be a national football champion when he was young.