题目

完形填空Dear my children,I hope this letter meets you well. I'm sure sofar you've had many problems that the knowledge of books can't 1 . Well, I will help you. I am here 2 you, but before we start, let me 3 to you that you must only depend onyourselves. I don't want to tell you how to 4 all the problems or the difficulties you meetwith.My children, life isn't 5 or fair but we shouldn't be afraid of that andlife is still what we make it. Whatever life hurts you, you should rememberthat it doesn't define(定义) you. The way how you 6 life is very important. So, if life gives youlemons, my 如图，AB∥CD，若∠1=60°，则∠2等于（　　）A．60°B．90°C．120°D．150°