Keeper of the SpringAn old man lived in a quiet forest high above an Austrian village along the eastern side of the Alps（阿尔卑斯山）. He had been hired many years earlier by a young man from the town council（委员会）to clear away the rubbish from the pools of water up in the mountain that fed the lovely spring flowing through their town. Faithfully and silently, he walked around in the hills every day, removed the leaves and branches, and wiped away the mud that would otherwise have choked and polluted the fresh flow of water. The village soon became a popular attraction for vacationers.Years passed. One evening the town council met for its monthly meeting. As they reviewed the budget, one man's eye caught the salary being paid to the keeper of the spring. Said the keeper of the purse, “Who is the old man? Why do we keep him on year after year? No one ever sees him. For all we know, he is doing us no good. He isn't necessary any longer.” After a vote, they stopped the old man's services.For several weeks, nothing changed.By early autumn, the branches and leaves of trees began to fall into the pools, blocking the rushing flow of water. Within a few days, the water became darker and darker. Within another week, a terrible smell was detected（察觉）. Soon, fingers of disease reached deeply into the village.Realizing their error of judgment, the council rehired the old keeper of the spring and within a few weeks, the river of life began to clear up.Never become discouraged with the seeming smallness of your task, job, or life. The key to achievement is believing that what you can do will make a difference.Tourists coming to the village were mainly attracted by_____.

Keeper of the SpringAn old man lived in a quiet forest high above an Austrian village along the eastern side of the Alps（阿尔卑斯山）. He had been hired many years earlier by a young man from the town council（委员会）to clear away the rubbish from the pools of water up in the mountain that fed the lovely spring flowing through their town. Faithfully and silently, he walked around in the hills every day, removed the leaves and branches, and wiped away the mud that would otherwise have choked and polluted the fresh flow of water. The village soon became a popular attraction for vacationers.Years passed. One evening the town council met for its monthly meeting. As they reviewed the budget, one man's eye caught the salary being paid to the keeper of the spring. Said the keeper of the purse, “Who is the old man? Why do we keep him on year after year? No one ever sees him. For all we know, he is doing us no good. He isn't necessary any longer.” After a vote, they stopped the old man's services.For several weeks, nothing changed.By early autumn, the branches and leaves of trees began to fall into the pools, blocking the rushing flow of water. Within a few days, the water became darker and darker. Within another week, a terrible smell was detected（察觉）. Soon, fingers of disease reached deeply into the village.Realizing their error of judgment, the council rehired the old keeper of the spring and within a few weeks, the river of life began to clear up.Never become discouraged with the seeming smallness of your task, job, or life. The key to achievement is believing that what you can do will make a difference.The town council fired the old man because they thought_____.

Keeper of the SpringAn old man lived in a quiet forest high above an Austrian village along the eastern side of the Alps（阿尔卑斯山）. He had been hired many years earlier by a young man from the town council（委员会）to clear away the rubbish from the pools of water up in the mountain that fed the lovely spring flowing through their town. Faithfully and silently, he walked around in the hills every day, removed the leaves and branches, and wiped away the mud that would otherwise have choked and polluted the fresh flow of water. The village soon became a popular attraction for vacationers.Years passed. One evening the town council met for its monthly meeting. As they reviewed the budget, one man's eye caught the salary being paid to the keeper of the spring. Said the keeper of the purse, “Who is the old man? Why do we keep him on year after year? No one ever sees him. For all we know, he is doing us no good. He isn't necessary any longer.” After a vote, they stopped the old man's services.For several weeks, nothing changed.By early autumn, the branches and leaves of trees began to fall into the pools, blocking the rushing flow of water. Within a few days, the water became darker and darker. Within another week, a terrible smell was detected（察觉）. Soon, fingers of disease reached deeply into the village.Realizing their error of judgment, the council rehired the old keeper of the spring and within a few weeks, the river of life began to clear up.Never become discouraged with the seeming smallness of your task, job, or life. The key to achievement is believing that what you can do will make a difference.What happened after the old man was dismissed?

Keeper of the SpringAn old man lived in a quiet forest high above an Austrian village along the eastern side of the Alps（阿尔卑斯山）. He had been hired many years earlier by a young man from the town council（委员会）to clear away the rubbish from the pools of water up in the mountain that fed the lovely spring flowing through their town. Faithfully and silently, he walked around in the hills every day, removed the leaves and branches, and wiped away the mud that would otherwise have choked and polluted the fresh flow of water. The village soon became a popular attraction for vacationers.Years passed. One evening the town council met for its monthly meeting. As they reviewed the budget, one man's eye caught the salary being paid to the keeper of the spring. Said the keeper of the purse, “Who is the old man? Why do we keep him on year after year? No one ever sees him. For all we know, he is doing us no good. He isn't necessary any longer.” After a vote, they stopped the old man's services.For several weeks, nothing changed.By early autumn, the branches and leaves of trees began to fall into the pools, blocking the rushing flow of water. Within a few days, the water became darker and darker. Within another week, a terrible smell was detected（察觉）. Soon, fingers of disease reached deeply into the village.Realizing their error of judgment, the council rehired the old keeper of the spring and within a few weeks, the river of life began to clear up.Never become discouraged with the seeming smallness of your task, job, or life. The key to achievement is believing that what you can do will make a difference.What can we learn from this text?

Super Sense of Small①Dogs have a surprising sense of smell. It allows them to perform excellently at search-and-rescue operations. It also enables them to detect bombs. They can even sniff（嗅）out chemical changes resulting from certain diseases. Therefore, dogs are trained to save people's lives.②Dogs begin training when they are two months old. Their owners drop them off at training centers from 9 am to 5 p. m. every weekday. During the time, trainers play hide-and-seek with the dogs to train their sense of smell. They teach the dogs to climb ladders and run past obstacles（障碍）They also expose the dogs to loud noises.③Diseases have specific smells. Although the smells are usually too subtle for human noses to detect, dogs can tell something is wrong and warn people about the problem by barking. Many people have reported that their dogs warned them of an illness.④Scientists are training dogs to detect disease. A dog is asked to sniff a wheel. Blood samples from different people are attached to the outside of the wheel. Blood from a cancer patient has a slightly different smell than blood from a healthy person. The dog must figure out which blood sample to pick.⑤Scientists are working to design an electronic nose that can sniff out cancer. To do that, they need to figure out what molecules（分子）are sent out from the cancer. Then they can create a mixture with similar smell to that of the cancer. Once scientists know which molecules match the cancer's smell, e-nose could be designed to detect cancer.Paragraph①_____.

Super Sense of Small①Dogs have a surprising sense of smell. It allows them to perform excellently at search-and-rescue operations. It also enables them to detect bombs. They can even sniff（嗅）out chemical changes resulting from certain diseases. Therefore, dogs are trained to save people's lives.②Dogs begin training when they are two months old. Their owners drop them off at training centers from 9 am to 5 p. m. every weekday. During the time, trainers play hide-and-seek with the dogs to train their sense of smell. They teach the dogs to climb ladders and run past obstacles（障碍）They also expose the dogs to loud noises.③Diseases have specific smells. Although the smells are usually too subtle for human noses to detect, dogs can tell something is wrong and warn people about the problem by barking. Many people have reported that their dogs warned them of an illness.④Scientists are training dogs to detect disease. A dog is asked to sniff a wheel. Blood samples from different people are attached to the outside of the wheel. Blood from a cancer patient has a slightly different smell than blood from a healthy person. The dog must figure out which blood sample to pick.⑤Scientists are working to design an electronic nose that can sniff out cancer. To do that, they need to figure out what molecules（分子）are sent out from the cancer. Then they can create a mixture with similar smell to that of the cancer. Once scientists know which molecules match the cancer's smell, e-nose could be designed to detect cancer.Paragraph②_____.

Super Sense of Small①Dogs have a surprising sense of smell. It allows them to perform excellently at search-and-rescue operations. It also enables them to detect bombs. They can even sniff（嗅）out chemical changes resulting from certain diseases. Therefore, dogs are trained to save people's lives.②Dogs begin training when they are two months old. Their owners drop them off at training centers from 9 am to 5 p. m. every weekday. During the time, trainers play hide-and-seek with the dogs to train their sense of smell. They teach the dogs to climb ladders and run past obstacles（障碍）They also expose the dogs to loud noises.③Diseases have specific smells. Although the smells are usually too subtle for human noses to detect, dogs can tell something is wrong and warn people about the problem by barking. Many people have reported that their dogs warned them of an illness.④Scientists are training dogs to detect disease. A dog is asked to sniff a wheel. Blood samples from different people are attached to the outside of the wheel. Blood from a cancer patient has a slightly different smell than blood from a healthy person. The dog must figure out which blood sample to pick.⑤Scientists are working to design an electronic nose that can sniff out cancer. To do that, they need to figure out what molecules（分子）are sent out from the cancer. Then they can create a mixture with similar smell to that of the cancer. Once scientists know which molecules match the cancer's smell, e-nose could be designed to detect cancer.Paragraph③_____.

Super Sense of Small①Dogs have a surprising sense of smell. It allows them to perform excellently at search-and-rescue operations. It also enables them to detect bombs. They can even sniff（嗅）out chemical changes resulting from certain diseases. Therefore, dogs are trained to save people's lives.②Dogs begin training when they are two months old. Their owners drop them off at training centers from 9 am to 5 p. m. every weekday. During the time, trainers play hide-and-seek with the dogs to train their sense of smell. They teach the dogs to climb ladders and run past obstacles（障碍）They also expose the dogs to loud noises.③Diseases have specific smells. Although the smells are usually too subtle for human noses to detect, dogs can tell something is wrong and warn people about the problem by barking. Many people have reported that their dogs warned them of an illness.④Scientists are training dogs to detect disease. A dog is asked to sniff a wheel. Blood samples from different people are attached to the outside of the wheel. Blood from a cancer patient has a slightly different smell than blood from a healthy person. The dog must figure out which blood sample to pick.⑤Scientists are working to design an electronic nose that can sniff out cancer. To do that, they need to figure out what molecules（分子）are sent out from the cancer. Then they can create a mixture with similar smell to that of the cancer. Once scientists know which molecules match the cancer's smell, e-nose could be designed to detect cancer.Paragraph④_____.

Super Sense of Small①Dogs have a surprising sense of smell. It allows them to perform excellently at search-and-rescue operations. It also enables them to detect bombs. They can even sniff（嗅）out chemical changes resulting from certain diseases. Therefore, dogs are trained to save people's lives.②Dogs begin training when they are two months old. Their owners drop them off at training centers from 9 am to 5 p. m. every weekday. During the time, trainers play hide-and-seek with the dogs to train their sense of smell. They teach the dogs to climb ladders and run past obstacles（障碍）They also expose the dogs to loud noises.③Diseases have specific smells. Although the smells are usually too subtle for human noses to detect, dogs can tell something is wrong and warn people about the problem by barking. Many people have reported that their dogs warned them of an illness.④Scientists are training dogs to detect disease. A dog is asked to sniff a wheel. Blood samples from different people are attached to the outside of the wheel. Blood from a cancer patient has a slightly different smell than blood from a healthy person. The dog must figure out which blood sample to pick.⑤Scientists are working to design an electronic nose that can sniff out cancer. To do that, they need to figure out what molecules（分子）are sent out from the cancer. Then they can create a mixture with similar smell to that of the cancer. Once scientists know which molecules match the cancer's smell, e-nose could be designed to detect cancer.Paragraph⑤_____.

Super Sense of Small①Dogs have a surprising sense of smell. It allows them to perform excellently at search-and-rescue operations. It also enables them to detect bombs. They can even sniff（嗅）out chemical changes resulting from certain diseases. Therefore, dogs are trained to save people's lives.②Dogs begin training when they are two months old. Their owners drop them off at training centers from 9 am to 5 p. m. every weekday. During the time, trainers play hide-and-seek with the dogs to train their sense of smell. They teach the dogs to climb ladders and run past obstacles（障碍）They also expose the dogs to loud noises.③Diseases have specific smells. Although the smells are usually too subtle for human noses to detect, dogs can tell something is wrong and warn people about the problem by barking. Many people have reported that their dogs warned them of an illness.④Scientists are training dogs to detect disease. A dog is asked to sniff a wheel. Blood samples from different people are attached to the outside of the wheel. Blood from a cancer patient has a slightly different smell than blood from a healthy person. The dog must figure out which blood sample to pick.⑤Scientists are working to design an electronic nose that can sniff out cancer. To do that, they need to figure out what molecules（分子）are sent out from the cancer. Then they can create a mixture with similar smell to that of the cancer. Once scientists know which molecules match the cancer's smell, e-nose could be designed to detect cancer.Dogs can recognize chemical changes_____.