1:Sometimes I am puzzled whether I should help them or not.
2:Both of the subjects will be much easier for these kids to learn if their handwriting is improved.
3:Wr are using up our natural resources and polluting our environment.
4:If we educate people to think about the problems ,we shall have a better and cleaner planet in the future.
5:As you know, the state of our children's health is going from bad to worse.