1. There people will be think a shortage of  fresh water in the future.

2. We should carefully to save energy before prepare turning on to stove food in the kitchen.

3.  They often have a machine check regularly theirs cả.

4.European and North American are interested in saving money and natural resources countries.

5.It's a number of days for possible to store solar energy.

6.How about making posters on hanging and saving energy around our school?

7. What can we do to spend lighting less?

8. The label has tells how much energy effiency the consumers each model.

9. I suggest helping elderly people with their chores and war invalids.

10.They asked single printed page to keep drafting sheets for their children.

Chúc bạn học tốt!!!