阅读下列短文，从下面每小题的A、B、C、D四个选项中选出最佳选项。

    It's Sunday. There are many people in the bus. And an old man is looking here and there. He wants to find an empty sea（t  座位）. Then he finds one. He goes to it. A small bag is on the seat. And a young man is sitting beside it.

    "Is this seat empty（空的）?" asks the old man.

    "No, it's for a woman. She goes to buy some bananas." says the young man.

    "Well," says the old man, "Let me sit here please. When she comes back, I will leave here." The bus starts（启动）.

    "She doesn't come, but her bag is here. Let me give her the bag." Then the old man throws the bag out of the bus window.

    The young man jumps up and shouts, "Don't throw（扔）! It's my bag!"

    Most musicians agree that the best violins were first made in Cremona, Italy, about 200 years ago. These violins sound better than any other violin. They even sound better than the violins made today. Violin makers and scientists try to make instruments like the Italian violins. But they aren't the same. Musicians still prefer the old ones.

    Some people think it is the age of the violins. But not all the old violins sound wonderful. Only the old violins from Cremona are special. So age cannot be the correct answer.

    Other people think the secret to those violins is wood. The wood must be from certain kinds of trees. But the kind of wood may not be so important. It may be more important to cut the wood in a special way. Wood for a violin must be cut very carefully. It has to be the right size and shape. The smallest difference will change the sound of the violin.  Musicians sometimes think that it is the secret of the Italians. Possibly they understood more than us about how to cut the wood.

    Size and shape may not be the answer either. Scientists can make new ones which are exactly the same size and shape. But the new violins still do not sound as good as the old ones. Some scientists think the secret may be the varnish (清漆). Varnish is what covers the wood of the violin. It makes the wood look shiny. It also helps the sound of the instrument. But no one knows what the Italian violin makers used in their varnish.

    One day, a man saw an old lady sitting inside her car at the side of the road. Though it was dark, he could see she needed help. So he stopped his car and walked towards her. The old lady was worried, even though she noticed the smile on his face. Was he going to hurt her? "I'll help you start your car, madam. By the way, my name is Bryan Anderson, " he said.

    While Anderson was fitting a spare tired (备胎) to her car, the lady began to talk to him. She thanked him much for coming to help.

    Anderson just smiled as he put his tools away. The lady asked how much she should pay him. He told her that if she really wanted to pay him back, the next time she saw someone who needed help, she could give them the help they needed. He waited until she started her car and drove off.

    A few miles down the road, the lady saw a small restaurant. She went in and a waitress came over with a sweet smile. The old lady noticed the waitress was nearly eight months pregnant (怀孕的), but she never let the pains and aches change her smile when she served her.

    The lady finished her meal and paid with a hundred-dollar bill. The waitress quickly went to get change, but the old lady was gone when the waitress came back. The waitress wondered where the lady could be. Then she found there was a note on the napkin (餐巾), "You don't need to give me anything back. Somebody once helped me out the way I'm helping you. If you really want to pay me back, here is what you do—do not let this chain (链子) of love end with you."

    Under the napkin were four more $100 bills.

    One afternoon, on my way home, I saw a car accident (事故)!

    I asked people for help, but no one stopped. When the car driver and his wife saw this, they quickly closed the window of the car and drove away. "What shall I do? The old man needs help," I thought.

    At that time, a truck stopped and the driver came out. "What's wrong with the old man? What can I do?" the driver asked me. "Sir, please help the old man. A car hit him and he is badly hurt!" I said. "well, don't worry. Let me take him to the hospital first," the driver said.

    A few minutes later, the driver took the old man to the hospital and I called the police. I told the whole story to the police and I also told them the number of the car. The police said to me, "Well done, boy! Leave it to us, We will punish (惩罚) them!"

    When I got home, it was 7: 30. I thought I was great.

    Four beggars (乞丐) usually met at an old shack (小窝棚) at the end of the day. One day, they were very upset because none of them had got much in their begging bowls.

    "I only got this piece of meat today," the first said. "I hardly got anything," the second said. "I just picked up these few vegetables outside the fruit and vegetable store." The third complained that all he was given was a handful of herbs(香草) that he couldn't eat on his own. The fourth beggar didn't do much better. "I only got the handful of old, dried beans, but they aren't very nice!"

    As they sat around the fire, one of them had a great idea. "Let's put all our bits together and boil them. In this way, we can make a tasty dish and share it." They all agreed.

    However, the first beggar thought, "I don't want to share. I'll just pretend (假装) to throw my meat into the pot. They'll never know and I'll eat my meat later." So he pretended to put the meat into the pot. Now the same idea had also hit the other beggars and the shack was so dark that no one could see what the others were doing.

    Finally, one of them suggested that the dish should now be ready and, in turn, each of them helped himself to a bowl. They drank the hot water in absolute(绝对) silence, learning that selfishness doesn't taste all that good.