4) ride a horse
swim with dolphins
sleep in a tent
drive a racing car
climb a mountain
do a bungee jumping

5)Isabel has ridden a horse.
Isabel has swum with dolphins.
Isabel hasn't driven a racing car.
Isabel has climbed a mountain.
Isabel hasn't done a bungee jumping.

6)
I've climbed to the top of a tree.
I haven't seen a ghost.
I have been late for school.
I haven't gone on a summer camp.
I have swum in the sea.
I haven't left rubbish in the park.

7)
2: has climbed, climbed
3: have seen, saw
4: has done, did
5: have never slept, slept
6: has never flown, flew
7: has been, was
8: have never broken, broke