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.

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.