Giải:
1) Too much fresh water is wasted every day.
2) English is spoken all over the world.
3) Their rooms are cleaned by them regularly.
4) Rice is grown for a living here.
5) Nam's homework is done by him every day.
6) Dinner isn't cooked by Lan very often.
7) Clothes is usually washed by my mother for my family.
8) The flowers aren't watered by John regularly.
9) What is watched on TV by Nam every day?
10) Is your homework often done by you?