1. milk is used for making butter and cheese
2. bottles of milk are bought by the milkman to houses
3. many accidents are caused by careless driving 
4. the river bank is covered by weeds
5. .English is spoken all over the world by poeple

1: people use milk for making butter and cheese

⇒ Milk is used for making butter and cheese.

2: the milk man brings bottles of milk to house

⇒ Bottles of milk are brought to houses by the milkman.
 

3. Careless driving causes many accidents.
=> Many accidents are caused by careless driving.

4. Weeds cover the river banks.
=> The river banks is covered by weeds.

5. People speak English all over the world.
=> English is spoken all over the world.

6. They don't use the house very often.
=> The house is not used very often.

7. Do they speak French in this school?
=> Is French spoken in this school?

8. They make a lot of beautiful toys from recycled plastic
=> A lot of beautiful toys are made from recycled plastic.

9. The workers clean the streets everyday
=> The streets are cleaned by the workers everyday.
10, Are the concerts usually held at the university ?