阅读下面短文，掌握大意，然后从A、B、C、D四个选项中选出最佳选项。
One small thing changes Sonia. She always remembers(想起) the boy, but why doesn't she help him?
The boy wants to buy a book, but he can't,1he has no money. He is very sad. He looks at the money in Sonia's hand. He can buy the2with it. But Sonia walks away. Sonia doesn't3his idea. Then she comes back home. She tells it4her brother, David. David says, "Why not give him money? He needs5and you can help him."
Sonia6to that shop to find that boy, but7 never waits for someone. On that day, Sonia gets a8, Many people are like Sonia. We can help people a little sometimes, but we9want big ones. We want big opportunities(机会)and money. Big opportunities don't come at any time. But we have small ones every day.
Sonia waits for10opportunities at first, but she changes a lot. She also helps people with little things now.