haix. it suck! i feel so low today.
but i noe how to do dh/dx! woots. i was thinking for so long and i finally tot of the ans. whatever. even if i noe how to do so what? still fail mah. first question jiu dunno how to do le. how dumb can i be?
i'm sorry for everything!
ni xiang yao de wo que to neng guo ge ni wo quan bu
wo neng ge de que you bu shi ni xiang yao yong you de.