Ответ:
Level
1. manager
2. stage
3. choir
4. poverty
5. for
6. since
7. since
Level 2
1. already
2. ever
3. never
4. yet
5. already
1. Have Lisa traveled by plane?
2. He has just bought a new violin.
3. How long have you had guitar lessons?
4. Chris have never met famous people.
5. We have been to Italy three times.
Level 3
1. Jim has never play the drums before.
2. Has Kate performed on over stage?
3. How long have you listened to pop music?
4. Tom has not practiced the guitar since last week.
5. She has been famous for a few years.
6. Children have just done their homework.
Level 4
Sorry, but you must do this exercise yourself, because I don't know your favorite pop star or band.