美国高中生活最后一年计划I am turning into senior at a private school at

美国高中生活最后一年计划
I am turning into senior at a private school at CT this fall and I am confused with my future.
I am an overseas student and I certainly want to get good education in US,but I do not good on my high school career.
My interests will be in Math and Physics and right now I am in IB Math (SL) and I will be learning regular Physics.I will have no AP courses in senior at this moment,but the truth is the school does offer many courses such as AP Calculus AB & BC,AP Statistics,Multivariable Calculus and Chem/Physics AP.My GPA is 3.39 right now.
I can barely attend in Ivy League universities and I think its fine.The problem is can some other good Universities consider me while I am not taking the hardest courses in Math and Science at high school?I mean the schools with a good engineering program and high rank.
I know it is senior and it is hard to sort out the problem,but I still need some advises.I am studying SAT and some subject tests this summer,and I will do some volunteer work in the library and soccer practicing.I also will start my college essays.My question is do I need to refocus on the courses I will have and work hard to get to higher levels?
Please suggest,thanks!
美国雅虎没有人回应啊.郁闷,直接贴过来了,没有翻译见谅>