This post is a journal entry. (Ignore it)

Calculus test 2-I failed to answer more than 60% of the questions.-The failure was not because the questions were tough.-It was because i didn't know the theorems and the differentiation rules.-My tears had come out immediately when the lecturer announced, "Students, Time is out!"-Now, i am EMO and angry with myself.-I didn't know how to find the critical points, inflection points, concavity and so on. (I'm serious!)-I didn't know whether it was because of internal interference or external interference.What should i do?Xiu Le, C'mon , Study! Study! Study!I will have a totally different personality soon, so be prepared!Sorry in advance!I will try to control it!