1)
1. I haven't fallen of a bike, but I've fallen off a horse.
2. He has broken his arm, but he hasn't broken his leg.
3. She has been skiing, but she hasn't been surfing.
4. We've read a lot of magazines, but we haven't read many books.
2)
1. Have you ever played an instrument in a concert?
2. Have your parents visited a lot of countries?
3. Has your brother ever climbed a mountain?
4. Has your sister ever won a competition?
5. Have you ever found money on the floor?
3)
Jim: Have you ever burnt your hand?
Sophie: Yes, I did. I burnt it last week.
Jim: How did you do it?
Sophie: When I was making breakfast, I've put my hand on the cooker.