1. I don't know how the cat has managed to get through the window, but it did.
2. I'll post your letter, but I don't think the (...) is able to read the address.
3. Who is playing the piano upstairs?' 'My sister. She's got a concert tomorrow.
4. She appeared to have a problem now.
5. Not many passenger planes were flying faster than sound.
6. I didn't see Rob recently.
7. I wanted to be a doctor when I was fifteen.
8. He worked very hard this week.
9. It had snowed since I got up.
10. All the lights were switched on today.
11. He expected to come soon.
12. I don't want her telling everybody.
13. If she comes late again, she'll lose her job.
14. You shouldn't worry if I was you.
15. Pam rang to say that John had had an accident.
16. The winner was given a prize at the competition yesterday.
17. He found out that the Caf turned Royal into a casino.
18. A full explanation promised to us at the last meeting.
19. When I entered they were talking about this problem.
20. The professor said that Shakespeare hadn't speaked French.