8 oraciones de, how to express opinion ?

In my point of view water is sold off

I Bet that many People are not honest as they say

I guesst that in 2025 the Earth won't have enought water to drink

I think that trash is a dificult problem around the world

I am sure that being a politician is a very stressful profession

I consider English important nowadays

I would say that if you want tô be a professional, you must have to work hard

I feel that playing soccer is really nice to relax a little bit.