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16. He saw the dog run across the street.
17. They allowed him to write a letter to his family.
18. Son likes travelling by air.
19. It's not worth explaining anything to Tony.
20. I've wowrked in this hotel for six months.
21. When we were having dinner, there was a knock at the door.
22. She reminded him not to forget to post the letter.
23. He is looking forward to hearing from her as soon as possible.
24. It's better to avoid travelling during the rush hour.
25. Do you mind helping me to put the chairs away?
26. Before we passed the exam, we had worked very hard for it.
27. After her brother had checked the prices, he bought a new washing machine.
28. She notices the boy run away from the house.
29. I heard him leave the house early this morning.
30. When the police arrived, the thief had escaped.
31. When I came, Tom had left.
32. They didn't let us enter this room.