All exercises here are taken from
www.english-grammar-lessons.com
Exercise 1 - Completing sentences
Exercise 2 - Cloze
Exercise 3 - Mix and Match
Exercise 4 - Rewriting sentences
Exercise 5 - Completing sentences
ccc.commnet.edu/grammar
All exercises for the passive are taken from
www.better-english.com
Exercise 1
Exercise 2
Exercise 3
Passives - mixed exercises
Past Passives
On line grammar and vocabulary practice
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www.abcteach.com
The exercise is taken from
www.better-english.com