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 have learned a lot from being a taxi driver. I've been in the 31 for many years, and I know there is a lot about it that is not so 32 . Taxi drivers have to be tough to 33 the New York traffic eight hours a day. Because taxi drivers are tough, people get the wrong 34 that they are bad. You can read in the 35 almost every week that taxi drivers 36 the things people left in their cabs. If they weren't 37 , you wouldn't read those moving stories in the papers.

　　In 1913, I bought my own cab. It was difficult at that time so I had 38 part of my money for something unexpected. I did pretty well, 39 in those days. One time in Brooklyn, I found a 40 in my cab. I remembered helping a lady with a lot of baggage that day, so I went back to where I had 41 her off. It took me almost two days to find her so as to 42 the ring. I didn't get as much as " 43 ". Still, I felt good because I had done what was right.

　　People ask me about the 44 . As far as I know, 45 everyone will give you something. Most Americans are pretty 46 . I always try to be nice to everyone, whether they tip or not. In all my years of driving a cab, I have never had any 47 with the public. I try to 48 others the way I want to be treated. I have been trying this for a long time, and the longer I try, the 49 it gets. Up till now, I still hold the view that 50 is one of the greatest qualities of people.

31. A. project B. department

C. business D. organization

32. A. good B. helpful

C. bad D. advisable