Ответ:

1. Today she is a famous film star, but when she was twenty years old she wasn't.

2. There are six members in the band now.

Three years ago there were only four members.

3. A: Could you play the guitar well when you were twelwe?

B: No, I couldn't, but I can play it well now.

4. I have got five brothers, but I haven't got any sisters.

5. When I was young, there weren't any nightclubs in the town.