Find and correct the mistakes in these sentences. 1) as a

Find and correct the mistakes in these sentences.
1) as a doctor, i work more hard than other professionals.
2) the more water we drink the best we feel.
3) the second experiment worked as good as the first one.
4) i can't walk more far than ten miles.
5) the greater the weight the difficult it is to carry.
6) the science laboratory isn't nearly clean as it should be.
7) chemistry is the less boring of the sciences.
8) the best you revise the more well you'll do