题目内容：
People in communities have slowly been pushed apart through the years, mostly becausepeople simply aren't taking the time to say a simple "hello". After considering this phenomenon, Idecided I was going to change the way I was doing things.
My 41 came one morning when I was in the community library. I passed by a girlwho42her books out of her locker. Thinking like most that someone else would help her pickthem up, I continued my way. However, when I had to43because I stupidly forgot my book, Inoticed she had just finished packing them up by herself. No one had stopped to44her.
"OK" I thought to myself, "this is where I should have changed."
My best opportunity came a few days later when I saw a man45by himself waiting for thelibrary to open, so I sat down next to him and began a46. It was difficult to get started, andeven when I had to say goodbye, almost every47from my new friend had a tone of doubt in it.And who could blame him?
People aren't used to making an48 chat with a stranger. But a change, no matter how des-perately it is needed, doesn't just happen; it takes people like us to make it possible. I49you totake a small step out of your comfort zone and try to make someone's day a litle brighter, togeth-er, we can really make society come50as a whole.
阅读以上短文，回答题。
第41题答案是__________ A．trouble
B．doubt
C．wish
D．opportunity
参考答案：
答案解析：