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，选出可以填人空白处的最佳选项，并在答题卡上将该项涂黑。 I take the train to work every morning from a train station near my house. I can get to the station quitebecause there is a short cut(捷径)to the station. But in the summer, it can get quite smelly because of all the. So I always try tothrough it. Today I was trying to do so as usualsomething made me stop for a moment. I saw the most beautifulby an old woman walking in front of me with the help of a white. She was short andand had white hair. She was walkingas each step took some effort. I hadn’t specially noticed her,until she stopped near a rubbish bin. She slowly placed her walking stickthe rubbish bin. Then she leaned(斜倚着)on it with her right hand. She bent down and51the rubbish. She clearly found itand it took her a while. Shesome rubbish with her left hand and slowly straightened(伸直) herself up again. All the while she used the rubbish bin toherself. She threw the rubbish inside the bin and thenwalking. It all took her great effort（努力）. There’s so much rubbish and no one ever doesabout it. I was moved tothis old woman make such a great effort to keep even a small part of it! I haven’t been able tothinking about that all day. I want to follow her example. I’ve decided to pick up rubbish off theif I meet from now on. I hope people will do the same as I do.