I.
1. William has already tidied up his room.
2. Caroline missed the schoolbus yesterday.
3. In 2004, the Olympic Summer Games took place in Athens.
4. I can't go out tonight. My grandparents will come to see us.
5. I have just finished my homework.
II.
1. A: I have just cycleed 50km.
2. B: I cycled 100km yesterday.
3. A: I wrote an essay yesterday.
4. B: I have already written two essays this term.
5. A: I have just ringed my friend.
6. B: I ringed my friend 2 hours ago.
7. A: two days ago, I watched a Madonna live in concert.
8. B: I have already seen Madonna live in concert.
9. A: I spent my summer hiloday in Australia last year
10. B: I haven't been to Australia yet.
