1. Was 'Mona Lisa' painted by Leonardo da Vinci?
2. A thief was caught by a police officer yesterday.
3. I was given a lot of presents for my last birthday.
4. A class trip to the mountains wasn't organised by our teacher last year.
5. Coca Cola was first produced in the USA.
6. Were twenty patients examined by the doctor yesterday?
7. A new road was built in my city last year.
8. Cookies weren't eaten by John.