Chinese or Korean

<p>Hi, i registered for chinese sat2 this saturday and never studied for it..
i used to live in china for about three years but my grammar is really bad.
when i do test prep, i usually get aroud 15 wrongs
anyways, i speak korean fluently and wondering if i should take korean instead of chinese
whats the approximate score for 15wrongs on chiense sat II?
is it better to get a low score on foreign language or 800 on native language?
i got a 4 on ap chiense
i am a senior and this is my last chance to take foreign language sat</p>