1.I disagree, because It is normal to relax after hard work.
2.I agree with it,because It is useful for health.
3.I agree, because all children have to study.
4.On one hand It is useful, but on the other hand It isn't, because not all children want to cook from young years their life.
5.I agree with this sentence, because they can show you,what you know and what don't
6.I agree with that, because until 18, children have to study, because in future they will work.