How can i Raise my GPA?

so my dad said he will take me to england if i can keep a 95 average in all my cles, so My english, math, french, and cad cl i have 97 average, but i'm taking a college level biology cl which is really hard. We have a weighted grade system, so our exams are worth alot of our grade, i do not tak multiple choice tests well for some reason so i have an 61 in the cl, but if you just average all my grades togethor i would have a 90, i just really want to go to england and my dad said he doesn't care how tough the cl is, i study 2 hours a night just for this cl i just don't know what to do and help?