1. I have bought a new book about wild animals
2. He has been riding a bike since morning.
3. Tom has writed a report about African elephants
4. The wind has been blowing since yesterday
5. Harry and John have been fishing since 5 am.
6. Tim has prepared for the Maths test
7. Kate has been looking for her notebook for 20 minutes.
8. Lisa has been to Poland twice
9. Mary has been surfing the Net for an hour
10. Ben has watered the flowers in the garden