Change into passive
1. We should use cloth bags instead of plastic bags
2. We can usethe garbage to make fertilizer
3. You mustn't I open this parcel until Christmas Day
4. They can't make tea with cold water
5. People use milk for making butter and cheese
6. The milkman brings bottles of milk to houses
7. Careless driving causes many accidents
8. Weeds cover the river bank
9. She bought two new dresses yesterday
10.They don't uses this house very often
11. Do they teach French in this school?
12. They make a lot of beautiful toys from recycled plastic
13. The workers clean the streets everyday
14. Do they usually hold the concerts at the university ?