Exercise 33 : Because/Because of
1.    Because
2.    Because
3.    Because of
4.    Because
5.    Because of
6.    Because of
7.    Because of
8.    Because
9.    Because
10. Because of

 Exercise 34 : So/Such
1.    So
2.    Such
3.    So
4.    So
5.    Such
6.    Such
7.    Such
8.    So
9.    Such
10. Such
11. So
12. So
13. Such
14. So
15. So

Exercise 35 : Passive Voice
1.    The president is called by somebody every day
2.    The other numbers are being called by john
3.    MR. Watson will be called by somebody tonight
4.    Considerable damage has been caused by the fire
5.    The supplies for this class should be bought by teacher

Exercise 36 : Causative Verbs
1.    Leave
2.    Repaired
3.    To type
4.    Call
5.    Painted
6.    Write
7.    Lie
8.    Sent
9.    Cut
10. To sign
11. Leave
12. To wash
13. Fixed
14. Published
15. Find