1. A lot of money is spent on heating every year.

2. Our use of electricity is reduced to save our energy.

3. Is coal replaced by another renewable resource ?
4. Are bread and milk often had for your breakfast ?
5. I am often bought a math magazine on my father's way home

6. Many lakes and rivers are polluted by pollution from factories.

7. Flowers in the garden are cut by Lan's grandmother in the morning.

8. We are taught how to speak English properly.

9. Rice is planted in many tropical countries

10. Are the concerts usually held at the university ?

1. People spend a lot of money on heating every year.
A lot of money ... is spent by people
2. We reduce our use of electricity to save our energy.
 Our use of electricity  ...is reduced to save our energy
3. Do they replace coal by another renewable resource?
 Is coal ...replaced by another renewable resource ?
4. Do you often have bread and milk for your breakfast?
 Are bread and milk ...often had for your breakfast ?
5. My father often buys me a math magazine on his way home. 
 I ....am often bought a math magazine on my father's way home
6. Pollution from factories pollutes many lakes and rivers.
 Many lakes and rivers ...are polluted by pollution from factories
7. Lan’s grandmother cuts flowers in the garden every morning. 
Flowers ... in the garden are cut by Lan's grandmother in the morning
8. Mr. Robinson teaches us how to speak English properly.
We ...are taught how to speak English properly
9. People plant rice in many tropical countries.
Rice ... is planted in many tropical countries
10. Do they usually hold the concerts at the university?
Are the concerts ... usually held at the university ?