题目

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。How to Have a Successful Teenage LifeEveryone wants to succeed in their life, don’t they? Even as a teenager, you can achieve success in your life; it really isn’t that hard. 【1】Do well in school. No matter how boring it is now, education will help you be a productive member in society. Try your best for excellence in school; listen to the teachers, do your homework, study, and get good grades. Doing so will help you get into a better university, which will enable 点A（-2,a）和点B（b,-5）关于x轴对称,则a+b=___________。