Change into passive sentences

EX1. Change into passive sentences
1. She teaches grammer and writing
->
2. Lan bought her brother some comic books
->
3. His father will help you tomorrow
-> 
4. Science and technology have completely changed human life
-> 
5. Peter broke this bottle
-> 
6. They are learning English in the room
->
7. My students will bring the children home
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8. The chief engineer was instructing all the workers of the plan
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9. Somebody has taken some of my books away
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10. They will hold the meeting before May Day
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11. People spend a lot of money on advertising everyday
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