What about <<我很渴>>?

Is anything wrong with 我现在真渴？

So, duo ignores the fact that 很，真，非常, etc are all gradual intensifiers but insists they ALL mean very. I.e I learned that 非常 is similar to extremely in English, but duo always counts that wrong. But, somehow they expect us to magically differentiate between all of them?

Shouldn't it end with a 了？