1. B

2. A

3. A

4. C

5. C

6. B

7. A

8. D

9. C

10. A

11. C

12. A

13. A

14. D

15. C

16. C

17. D

18. A

19. D

20. D

21. C

22. B

23. B

24. C

25. C

26. D

27. D

28. A

29. B

30. B

31. C

32. D

33. B

34. C

35. B

36. B

37. A

38. B

39. C

40. A

1b can be made

2a must be warned

3a has to be wrapped

4c have to be done

5c can participate

6b a/the

7a the/the

8d x

9c the

10a the/the

11c was built

12a advised

13a a seven-room

14d won't be

15c were

16c used to go

17b didn't spend

18a which

19d would be

20d did they

21c since

22b have

23b saw

24c have to be rebuilt

25c naked

26d drought

27d scare

28a entrance

29b nylon

30b was painting

31c she

32d isn't he

33b interested

34c didn't buy

35b many

36b tell

37a exciting

38b until

39c because

40a pronouncing