passive, causative, active vs passive practice

Try to do these activities to practise the passive voice:

• Exercises to change to passive:  1 (explanation and exercise),    2 (multiple choice exercise),    3,   4
• Passive with modals:  1,     2
• Passive sentences with two objects verbs:  1,   2
• Causative /have something done:  1 (explanation),  2,     3

Active, passive or causative: 1 (test exercise),  2 (text with answers below)