题目

阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。 I was broke after the bankruptcy(破产) of my company and before that, my marriage also came to an end, which may be the hardest truth to me. Suddenly, I got 1 lost. That one can start from nothing thing was much like nonsense. It was never easy! So I chose to 2 myself at home. Unexpectedly, my mom came to my 3 and took me to the hospital. After my 4, she paid for my exercise class in a gym just to 5 my mind. One day, my mom was driving me back from 6. We were talking. 已知AB=3(e1+e2)，BC=e2-e1，CD=e1+2e2，则下列关系一定成立的是（　　）A．A，B，C三点共线B．A，C，D三点共线C．A，B，D三点共线D．B，C，D三点共线