How? EL1101E is darn tough la!

Oh man.. today went for EL1101E Tutorial... guess what.... i got back my EL1101E mid terms...
BAD results.... i got 17/40 for that test... kind of feel sad... cos 3rd question out of 4 was a give away and out of my panicness i do wrongly.. imagine u got 20 marks out of 40 marks questions to do and ur lecturer says... "u got 10 minutes left" and i did it in a hurry lo... in the end drew the wrong tree diagram... which in fact is a perfect diagram... anyway i did have some answer that is correct inadditional of the tree.. so i went to my tutor and ask can i get some marks from that... she give me a suspicious look saying " is this originally like this"... i was like... the..... of course... u trying to say i cheat... haiz.... but nvm she in the end accepted to remark that question for me... now hope i can pass the paper with that answers... just 3 more marks!!!!

- Lesson learnt: Open book exams is not as easy as u think.