阅读下列短文，把A—E五个句子填入文中空缺处，使短文内容完整正确。
   A farmer's dog, Dolly, had babies, and the farmer needed to sell them. He painted a sign and put it in his yard. {#blank#}1{#/blank#} , a little boy walked up to him.
   “Sir," he said, “I want to buy one of your dogs.”
   “Well,” said the farmer, “these dogs are very expensive.”
   "{#blank#}2{#/blank#}   " asked the boy.
    "Sure,"said the farmer. “Here, Dolly!” he called.
   Dolly ran out from the doghouse and four little dogs followed her. The boy became excited.Then, the little boy noticed another dog. This one was smaller.{#blank#}3{#/blank#} 
   “I want that one,” the boy said, pointing to the little dog. The farmer said: "{#blank#}4{#/blank#}  He will never be able to run and play with you like these other dogs."
   The little boy reached down and rolled up one leg of his pants. He showed a cast (石膏) on his leg and a specially made shoe. He said: “You see, sir, {#blank#}5{#/blank#}  , and he will need someone who understands.”

    The spring season brings warm weather, flowers and other changes for people to enjoy. For some restaurant cooks, the most exciting spring arrival is ramps.

    Ramps are a wild plant in the eastern mountains of North America. They are one of the first plants that grow in the spring, usually between April and May. They are recognized(意识) by their red stem(茎), and two long and wide green leaves. They are also famous for their strong taste, similar to onions(洋葱).

    Ramps are not as well-known as other vegetables, but they have a long history in the United States. In the Appalachian Mountains, ramps have been an important food for a longtime. During spring, it is common for small towns in the Appalachian area to hold large ramp dinners for the community.

    However, over the last 30 years, ramps popularity has grown quickly. They are now a highly-desired vegetable for many nice restaurants in cities like New York and Washington D.C.

    One reason the plant is popular is that it grows in the wild. It is difficult to grow them on farms. Most restaurants get them from foragers, who collect ramps by searching forests for some small pieces of land where they grow. Ramps have a short season. Within a few weeks of full growth, the plant is done for the year. This shot life is some reason for their popularity.

    And that popularity could lead Io their disappearance from Earth. In 1995, the local government in Quebee, Canada, stopped people selling the plant to businesses in order to protect the plant against being over-dug.

    The season is short, but it has not ended yet. If you are in the right place, you still have time to try a taste of ramps yourself.

根据材料内容选择最佳答案。

    Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big. And they can eat small animals. One famous meat-eating plant is the Venus flytrap(蝇草).

    The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of a book. They can open and close very quickly. Inside the leaves, there are three small hairs. If a fly (苍蝇) touches one of the hairs, the leaf closes quickly. The fly cannot get out. In about half an hour, the leaf presses the fly until it is dead. Then, the plant covers the fly. Slowly, the plant eats the fly.

    Why do plants do it? Most plants get what they need from the sun, the air, and the ground. In some places, the ground is very poor. It doesn't have all these important things, especially nitrogen(氮).Animal meat has a lot of nitrogen, so some plants eat meat to get what they need. Let's hope that some of the bigger plants don't get the same idea! 

    Amy is a biologist working at a marine （海洋的） park. These kinds of parks provide fun and education for tens of thousands of people each year.

    Amy takes care of many animals in the park, but she also does important research. As she observes the animals that she looks after, she learns more about their needs and behavior. This information helps the animals in the park, but it can also be used to protect other members of the species（物种） in the wild.

    It's hard work to look after these animals. Their needs often change according to different hours of the day. So Amy must depend on her science knowledge and good number sense to help her make the right decisions all day long.

    Even though dolphins spend much of their time underwater, they are mammals. This means that they must come to the surface to take in air. Dolphins give birth to their young. They're not hatched from eggs. Just like all other mammals, mother dolphins must nurse, or feed milk to their babies.

    Amy and her team know this first﹣hand. One of their dolphins recently gave birth. A baby dolphin is not small, either. It was almost 1 meter long the day it was born. A big dolphin usually eats about 4% of its body weight in food every day. Amy knows that a mother dolphin that is nursing needs twice the food. So when the baby dolphin was born, Amy immediately doubled the mother's food every day.

    Do animals have a culture? What do we mean by "culture?" Lately social scientists have begun to ask if culture is found just in humans, or if some animals have a culture too. When we speak of culture, we mean a way of life a group of people have in common. Culture includes the beliefs and attitudes we learn. It is the patterns of behavior that help people to live together. It is also the patterns of behavior that make one group of people different from another group.

    Our culture lets us make up for having lost out strength, claws, long teeth, and other defenses. Instead we use tools, cooperate with one another, and communicate with language. But these aspects of human behavior, or "culture," can also be found in the lives of certain animals. Animals can make tools, for example. We used to think that the ability to use tools was the dividing line between human beings and other animals. Lately, however, we have found that this is not the case. Chimpanzees(非洲小猩猩) can not only use tools but actually make tools themselves. Animals can also share knowledge with each other and use their own language to communicate. So it may be important for us to know that the line dividing us from animals is not as clear as we used to think.

    On March 14, one of science's brightest stars went dark. Stephen Hawking, the world-famous British scientist, died at 76 in Cambridge, UK. 霍金是历史上最伟大的科学家之一。 He came up with the theory that the universe (宇宙) began with the Big Bang (大爆炸) and will end in black holes. His theories became the base for a lot of later research. 他还写书帮助人们了解宇宙。 His most famous book is A Brief History of Time (《时间简史》), which has sold more than 10 million copies around the world. Hawking has great scientific achievements. He is also a man with strong will.

    When Hawking was 21, a serious illness stopped him from walking and talking. Later in life, he had to sit in a wheelchair and "speak" using a computerized voice. But this didn't stop him from living a meaningful and colorful life. "If one is physically disabled (身体残疾), one cannot afford to be psychologically (心理上) disabled as well," he once said.