1.arrived, has left
2. discovered, has broken into
3. ate, have arrived
4. became, has worked
5. was, has found
6. visited, has lived
7. has studied, entered
8. showed, has drown
9. arrived, has already done
10. needed, has stolen
11. came, has forgotten
12.has already started, arrived
13. have lent
14. came, has been
15. has gotten, was