17. A. to
18. C. because of
19. A. being deceived
20. B. to study
________________________
21. being $⇒$ be
22. requiring $⇒$ required
23. to wash $⇒$ wash
24. however $⇒Ф$
25. such $⇒$ so
_________________________
26. A. outside
27. B. looked
28. A. However
29. C. discouraged
30. C. Modern
31. B. systems
32. B. operated
33. D. middle
34. C. first
35. B. appear
_________________________
36. B. for the children to go to bed
37. A. me one hour to go to work by bicycle
$@bangtann$
