短文理解  阅读下列短文，从每题所给的A、B、C三个选项中，选出最佳选项回答问题或完成句子。

      It was a Christmas night. I was an unlucky nurse who had to work on such a beautiful festival. When I was complaining（抱怨）about it, three people appeared at my desk — a tired woman and two children.

    "Are you all sick?"I asked doubtfully because they seemed all right.

    "Yes,"the woman answered weakly and lowered her head.

    But when they started to present their problems, things became unclear. One child had a fever, but his temperature was OK. The other child had an earache, but she could not tell me which ear hurt. It seemed that the mother was pretending（假装）to cough.

    Something was wrong. But I only explained that it might take a while before a doctor could meet them. "Take your time, please,"said the mother. I checked their charts — no address. Suddenly I knew, they were homeless while the hospital was warm.

The family huddled（蜷缩）together under the Christmas tree, smiling and talking with each other sweetly. Quietly, I went back to the nurses'station and told them what happened in the waiting room. It was just like God sending us a gift on Christmas Day. The nurses' station suddenly came back to life. All the nurses went into action for "a Christmas emergency（急诊）".

    We took out our meals for our Christmas "patients". We also put together oranges and apples as presents. We tried to exceed the needs of a family who only wanted a warm place on Christmas night. Later, the little girl kissed me and said, "Thanks for being our angel（天使）."

    When an ice cream sundae(圣代冰淇淋) cost much less, a boy entered a coffee shop and sat at a table. A waitress put a glass of water in front of him.

    "How much is an ice cream sundae?"

    "Fifty cents," said the waitress.

    The little boy pulled his hand out of his pocket and studied a number of coins in it. "How much is a dish of plain ice cream?" he asked.

    Some people were waiting for a table, and the waitress was not patient. "Thirty-five cents," she said angrily.

    The little boy again counted the coins. "I will have the plain ice cream," he said. The waitress brought the ice cream and walked away. The boy finished, paid the money, and left.

    When the waitress came back, she was surprised at what she saw. There were fifteen cents placed beside the empty dish. That was her tip.

    Sandwiches are delicious, but do you know how the first sandwich came? An English earl(伯爵)called John Montagu made it three hundred years ago. Montagu was interested in card games. He would play these games with his friends for a long time. He found it too boring to stop his games for meals.

    One day, in the middle of a game, Montagu was served a meal of sliced meat with bread. At that time, Montagu was playing the game that needed its players to cover one card over another. As Montagu looked at both the game and his food, an idea came to his mind.

    He took a piece of bread, put a piece of meat on it and covered that with another piece of bread. Then Montagu could play cards with one hand and eat his meal with another.

    Montagu's friends called the new meal sandwich because Montagu's full title was “the Earl of Sandwich”.

根据短文内容，选择最佳答案。

    One day, the Earth was very sick. He felt so bad that an earthquake happened. After the earthquake, it rained every day. Then the Sun told him to go to the hospital.

    The Moon looked at the Earth and said, "Look! Your skin should be the blue sea and the green land, but it is turning more and more yellow… "

    "It is the desert," the Earth said.

    The Moon put on her glasses and looked at him carefully. She saw that some people were cutting down trees near the desert.

    "I'll make these trees into chairs and beds. I'm going to get married in a few days," a young man said happily.

    "I want to make a wonderful piece of art with this tree," an artist with long hair said.

    "I'm too poor and I have a big family. I need to sell these trees to make money," an old man said while cutting down the small trees.

    "Winter is coming! I need more wood to make my house warmer," an old woman said.

    At that moment, a truck came with giant machines. A group of men got off the truck.  They began to cut down the trees with the machines quickly. Soon, all the trees disappeared and the truck took them away.

    The Earth began to cry. The Moon was too surprised to do anything. The desert laughed at the Earth, "Ha! Ha! You have nothing to do with me!"

    Dale is seven. He can go to school. On the first day, his teacher teaches him three words "I, you, he". The teacher says, "I am your teacher. You are my student. He is your classmate, "After class, Dale goes home. His mother asks him, "What does your teacher teach you today?" Dale says, "Listen, mom, I am your teacher. You are my student." He points at(指着) his father and says, "He is your classmate." His mother says, "No, dear. You are not right." Then she says, "I am your mother. You are my son. He is your father. "The next day, Dale's teacher asks Dale to make sentences. Dale stands up and says, "I am your mother. You are my son. He is your father." All the students in Dale's class laugh.

    A poor farmer had a friend who was famous for the wonderful apple tees he grew.

    One day, his friend gave the farmer a young apple tree and told him to plant it. The farmer was glad of the gift, but he did not know where to plant it.

    He was afraid that if he planted the tree near the road, strangers(陌生人) would take the fruit. If he planted the tree in one of his fields, his neighbors would come at night and take some of the apples. If he planted the tree near his house, his children would take the fruit. Finally he planted the tree in the deep forest. But without sunlight and good soil(土壤), the tree soon died.

    Later the friend asked the farmer why he had planted the tree in such a poor place. "What' the difference?" the farmer said angrily and then told what he had thought.

    "Yes," said the friend, "but at least someone could have enjoyed the fruit. Now not only no one could enjoy the fruit, but also you have destroyed (毁掉) a good apple tree!"