Răspuns:
1. The baby cried for half an hour before his mother woke up.
2. She failed the exam through she studied German for two years.
3. Obviously the boys smoked before I entered the room [...]
4. The band played for more than an hour before the people started to throw rotten tomatoes at them.
5. Although he tried hard to memorize the poem he couldn't even remember the first stanza.
6. Professor Evans lectured on socialist economy for 15 years before he decided to change the subject.
7. He was absolutely worn out that morning because he drank heavily all night.
8. Samantha worked as a model for two years before her picture appeared in "Playboy".
9. We have evidence that Mrs. Reynolds cleaned the windows shorty before she fell down.
10. The prisoner saw the bars for three nights before he finally made his escape.
11. Although the girls only missed for eight hours the parents decided to call the police.
12. The dog whined for the whole day before our neighbour finally threw him a bone.
13. The diver discovered a pirate ship that lied on the sea bed for two centuries.
14. Roy worked over a math problem for two hours before his sister came and helped.
15. The rabbit was very tired. He ran from the dog for hours.
16. I realized someone used my camera because there were finger marks on the lens.
17. No wonder the engine broke down yesterday; it ran for 24 hours.
18. At last the experimenters found the vaccine they tried to develop for three years.
19. The fresco which the artist painted since the previous summer was ready in August of 1661.
20. It was only last year that Joan finished the book she wrote since 1981.
