Ответ:

сори, могу подсказать только второе()

2)1. They didn't use to have mp3 players

2. Teenagers didn't use to listen to hip hop

3. They use to watch cartoons on TV

4. People didn't use to drive on electric cars

5. People didn't use to play on computer games

6. Online shopping didn't use to be popular

7. People use to wear flared trousers