16. A lot of people were invited to their party last night.

17. The key was found under the table.

18. This machine hasn't used for age.

19. Many accidents are being caused by bad drivers.

20. The walls ought to be painted.

21. The facsimile was invited by Alexander Bain in 1843.

22. The beans are dried in the sun.

31. Payment can be made at any post office.

32. The trophy was presented to the winner by the President.

33. A new supermarket is going to be built in my neighborhood.

34. Bicycles should be used for short journeys.

35. Are you interested in surfing the web?

36. He was made to study hard for the exam by his parents.

37. The date of the meeting will have to be changed again.

38. The birds were seen to return to their nest in the evening.