1 A=> don't

2 C => as

3 B => hard

4 D => easily

5 D => perfect

1 A => ought to

2 A => to leave

3 A => is

4 C => up

5 B => upstairs 

1: A: ought => ought to

2: A: leave => to leave

3: A: are => is

4: C: on => up

5: B: upstairs => upstairs 

31 C => much

32 D => some

33 D => plenty of

35 A => a little

36 a few

37 little

38 many

39 much

40 few

41 little

42 many

43 a few

44 a little

45 many

46 the numbder of

47 A large number of

48 much

49 Most

50 a little

1, C=>cleaned

2,A=>Despite

3,A=>fewer

4,B=>whose

5,D=>The next day

6,D=>slowly

7,B=>is

26. C (-> cleaned)

27. A (-> Despite)

28. A (-> fewer)

29. B (-> whose)

30. D (-> the next day)

31. D (-> slowly)

32. B (-> is)

33. B => driving

34. B so

35. B but

1 C => is living

2 C => closed

3 B => like

4 B => out

5 C => fool