I have got 68% in my monthly tests, how can i change myself?

Try and practice more in that subject.

Explanation:

Same happened to me but except mine was lower. As soon as I saw my results, I started to change my mood towards work and I practiced more of the lessons I had failed in. I started going higher and yeah, hope this works for you too:)

answer: it means that he would rather write than preach.

explanation: its what it says

in the line from the end of the story "the cask of the amontillado," by edgar allan poe, the narrator has put the last stone on the wall, thus sentencing fortunato to death. just like that montresor associates his feeling of sickness to the humidity of the catacombs, and seems to be glad he has taken revenge on fortunato. however, montresor's last words are "in pace requiescat," which mean "may he rest in peace." as a result, it can be inferred that he hides or does not want to assume his guilt or remorse for killing fortunato in such a horrible way.