申请MIT的弄点啥EC比较好?

俺有几个问题：1. mitadmission.org是唯一的申请的指定网站吗？ 2.高中四年， 除了把GPA弄高， 参加数理算竞赛， 写作和外语是不是也挺重要的？3. 据说EC要符合MIT的mission, 俺看半天没明白哪些EC比较符合，请大家推荐。谢谢！ 

Your extracurricular activities should also be used to demonstrate that you have leadership skills. When you join clubs, try to secure leadership positions in them. Don’t be afraid to run for an office in your club. If your school does not have a club in your interest area, talk to the administration about starting your own. You will likely find that there are several other students at your high school who would enjoy participating in a club that you create. Starting your own club also allows you to show your initiative and your leadership skills.
If you start high school with the singular goal of gaining admission to MIT, you should recognize that the school accepts a very small percentage of the students who apply. You should instead focus on being the best student and person that you can be and in gaining a better understanding of who you are and what you enjoy. If you focus on bettering yourself rather than simply gaining admission to MIT, you might make yourself a more attractive applicant when the time comes to submit your applications.