阅读下面短文，掌握其大意，然后从各题所给的四个选项中选出一个最佳【答案】。
It was sunny last Friday. I arrived at the railway station at three in the afternoon. I would take the___16___to Shanghai to see my old friend Jack. But it was two hours___17___my train left. I thought it was the perfect time and place to look___18___an act of kindness to do.
Outside the station, there was a girl having___19___for sale. I told her that I'd like to buy flowers for someone else, and that she could___20___who she will give the flowers to. She looked a little puzzled(困惑的), ___21___I suggested that perhaps she could give the flowers to someone who looked a little___22___. That was because the flowers might cheer him or her up.
"That's a crazy idea!" said the girl. But then I explained a little more about the idea of doing something for a______23______, and she understood.
"I'm leaving for Shanghai and then I'll___24___know how it turns out," I said. "But you will have a good_____25_____to make someone happy. ___26___good deeds(善举)we do, they always come back to us." At that time, she started to seem excited about it.
She went to___27___the flowers out of the water, and I explained, "You'd better leave the flowers there until the person___28___."
At that time, I thought she was___29___surprised and happy, because it might be her first time to meet a customer like me. I___30___for the flowers, said goodbye, and walked into the station.
How wonderful the day was!
16. A. bus B. train C. plane D. underground
17. A. when B. before C. while D. after
18. A. for B. at C. up D. into
19. A. tickets B. snacks C. fruits D. flowers
20. A. decide B. follow C. change D. praise
21. A. or B. but C. so D. yet
22. A. happy B. sad C. proud D. nervous
23. A. customer B. visitor C. passenger D. stranger
24. A. often B. never C. usually D. seldom
25. A. plan B. time C. chance D. promise
26. A. However B. Whatever C. Whenever D. Wherever
27. A. take B. put C. carry D. make
28. A. leaves B. goes C. appears D. stands
29. A. between B. from C. among D. beyond
30. A. prepared B. asked C. cared D. paid
文章大意：文中讲了作者上周日乘坐火车去上海，在火车出发前买了一些花，请卖花的女孩帮自己送给看起来难过的陌生人。