根据短文内容，选择正确答案。 What can little money do? It's worth thinking it over. A few weeks ago, I got $120 from a friend in a Smile Group. He asked me to do good things with the money. Since then I have used the money to help strangers, and raised a lot of smiles. One day I was in a shop, looking at the second-hand books. It happened that the book shelves (架子) were next to the toy shelf. I noticed that a poorly dressed woman standing behind me. A girl about 3 years old came over to the toy shelf. At once her attention was caught by a toy dog. She spoke to her mother and her mother asked the shop owner how much it cost. The answer was$ 3. Then she said “no”. The child said nothing. Maybe "no" was not new for her, but she couldn't keep the disappointment away from her face. I had a total of $ 5. I put the money in the mother's hand and said, "Buy her a book, too." I didn't wait to see the end. I walked out of the shop. The money the friend gave me was to help me find happiness in the world. Was there any better way to get so much happiness with so little money?（1）The writer got from his friend a few weeks ago.A．little helpB．some moneyC．book shelvesD．a lot of smiles（2）The girl was interested in .A．a bookstoreB．a toy dogC．toy shelvesD．second-hand books（3）From Paragraph (段落) 3, we can learn that the mother .A．couldn't afford the toyB．disliked the toyC．couldn't stand the girlD．disliked the girl（4）We can infer (推断) the writer was after walking out of the shop.A．disappointedB．sadC．happyD．lonely（5）What's the main idea of this passage?A．Money is happiness.B．It's impossible to find happiness.C．Helping others can get happiness.D．We can't get happiness with little money.