1. By the age of twelve, Jim was able to speak English fluently.
2. She had gain a lot of working experience before she applied for that job.
3. We are in great troubles because we spent all of the money.
4. My father knows well about London because he has been there many times.
5. My friend had studied Japanese before she moved to Japan.
6. Had Peter owned a house for 10 years before he moved to the countryside?
7. Where did you lived before 1954?
8. Our team had encountered many obstacles before we succeeded.
9. Cindy was sick until she stopped eating junk food.
