1. A personal computer has been bought by us.

5. My computer has just been attacked by an unknown virus.

4. My computer has been repaired very quickly

3. A new personal computer has been bought by my friend.

2. The problem has not been solved yet.

1. We have been told that the sports meet will be put off.

1-5 DDDBD　 6-10. BBDBD

10. The bridges have been damaged by the typhoon because of its strong wind.

9. The book has been put under the bench for more than two days.

8. Some programs for the human resource department of their company have been developed.