part 1: has studied; part 2: arrived; part 3: have seen; part 4: met; part 5: has decided; part 6: announced; part 7: has watched; part 8: jogged; part 9: worked; part 10: have learnt; part 11: stayed; part 12: left; part 13: still has not received; part 14: Did you visit; part 15: knew; part 16: died; part 17: was; part 18: Have they lived; part 19: settled; part 20: has drunk; part 21: Has Addison been