Ответ:

1. cycling
2. to run
3. riding
4. listening
5. to learn
6. to study
7. learning
8. to be
9. going
10. to spend
11. working
12. to improve

Объяснение:

I'm really keen on (1) cycling. I sometimes enter competitions so I go (2) to run every day. I practise (3) ridingup hills because that's the hardest part! I also emjoy (4) listening to music, particularly rock-folk and I'd like (5) to learn the guitar one day.

I've recently decided (6) to study biology at university. I really enjoy (7) learning about animals and I think I'd like (8) to be a vet in the future. But before (9) going to university. I'm planning (10) to spend some time (11) working in England! I need (12) to improve my English!