1. The picture was painted in the 18th century.
2. Jane asked the boy where he came from.
3. They had been playing for two hours before we decided to take a break.
4. The eco-helpers had cleant up half of the rubbish on the beach by the time Jeff arrived.
5. Mike tells the funniest stories I've ever heard.
6. A good way to beat a problem is to think about it calmly and carefully.
7. Don't be late! The train will leave at 5:00 pm.
8. After all the passengers had boarded the plane, it took off.
9. When I asked him if he knew anything about the accident, shrugged his shoulders and said nothing.
10. I'll never forget going to school for the first time.
11. When I came home, dinner had already been cooked by my mum.
12. I'm so tired. I have been studying all day!
13. I was rading a book when somebody knocked the door.
14. I can't go out with you tonight. I am meeting my colleague.
15. Look how nice my room is now! I have painted the walls.
16. She is by far the most beautiful girl in our class.
17. Can you get me a few eggs from the market. Just 4 or 5.
18. How many lessons do you have on Monday?
19. The work must be done right now!
20. Mary told us that she would come to our place the following summer.