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.To design an e-nose, scientists must find out_____.

Summer SchoolIt was the first week of June. Gabi just finished her third year of high school. However, when she received her report card in the mail, she learned that she failed a semester of algebra（代数）. _____（26）Gabi was glad she had the chance to make up for the class. She can't move on to the next level in math if she doesn't pass algebra. Summer school isn't easy though. _____（27） During the regular school year, however, she has twenty weeks to do so.Summer school meant that Gabi would be stuck in a hot classroom while most of her friends were at the beach or local amusement parks. Gabi's friends didn't fail any course. _____（28）Going to summer school also meant that Gabi's family had to change their summer vacation plans.Gabi had to be in summer school from 9 a.m. to noon. _____（29）She had to be on the bus at least an hour before class started or else she would be late. The classrooms were hot since the school building was old and did not have air conditioning. When Gabi came home from school, she couldn't do whatever she wanted. She had homework to do.This was the first time Gabi had to go to summer school. _____（30）She made a promise to herself. In the fall, when regular classes begin again, she will try her hardest to pass all the courses.26._____.

Summer SchoolIt was the first week of June. Gabi just finished her third year of high school. However, when she received her report card in the mail, she learned that she failed a semester of algebra（代数）. _____（26）Gabi was glad she had the chance to make up for the class. She can't move on to the next level in math if she doesn't pass algebra. Summer school isn't easy though. _____（27） During the regular school year, however, she has twenty weeks to do so.Summer school meant that Gabi would be stuck in a hot classroom while most of her friends were at the beach or local amusement parks. Gabi's friends didn't fail any course. _____（28）Going to summer school also meant that Gabi's family had to change their summer vacation plans.Gabi had to be in summer school from 9 a.m. to noon. _____（29）She had to be on the bus at least an hour before class started or else she would be late. The classrooms were hot since the school building was old and did not have air conditioning. When Gabi came home from school, she couldn't do whatever she wanted. She had homework to do.This was the first time Gabi had to go to summer school. _____（30）She made a promise to herself. In the fall, when regular classes begin again, she will try her hardest to pass all the courses.27._____.

Summer SchoolIt was the first week of June. Gabi just finished her third year of high school. However, when she received her report card in the mail, she learned that she failed a semester of algebra（代数）. _____（26）Gabi was glad she had the chance to make up for the class. She can't move on to the next level in math if she doesn't pass algebra. Summer school isn't easy though. _____（27） During the regular school year, however, she has twenty weeks to do so.Summer school meant that Gabi would be stuck in a hot classroom while most of her friends were at the beach or local amusement parks. Gabi's friends didn't fail any course. _____（28）Going to summer school also meant that Gabi's family had to change their summer vacation plans.Gabi had to be in summer school from 9 a.m. to noon. _____（29）She had to be on the bus at least an hour before class started or else she would be late. The classrooms were hot since the school building was old and did not have air conditioning. When Gabi came home from school, she couldn't do whatever she wanted. She had homework to do.This was the first time Gabi had to go to summer school. _____（30）She made a promise to herself. In the fall, when regular classes begin again, she will try her hardest to pass all the courses.28._____.

Summer SchoolIt was the first week of June. Gabi just finished her third year of high school. However, when she received her report card in the mail, she learned that she failed a semester of algebra（代数）. _____（26）Gabi was glad she had the chance to make up for the class. She can't move on to the next level in math if she doesn't pass algebra. Summer school isn't easy though. _____（27） During the regular school year, however, she has twenty weeks to do so.Summer school meant that Gabi would be stuck in a hot classroom while most of her friends were at the beach or local amusement parks. Gabi's friends didn't fail any course. _____（28）Going to summer school also meant that Gabi's family had to change their summer vacation plans.Gabi had to be in summer school from 9 a.m. to noon. _____（29）She had to be on the bus at least an hour before class started or else she would be late. The classrooms were hot since the school building was old and did not have air conditioning. When Gabi came home from school, she couldn't do whatever she wanted. She had homework to do.This was the first time Gabi had to go to summer school. _____（30）She made a promise to herself. In the fall, when regular classes begin again, she will try her hardest to pass all the courses.29._____.

Summer SchoolIt was the first week of June. Gabi just finished her third year of high school. However, when she received her report card in the mail, she learned that she failed a semester of algebra（代数）. _____（26）Gabi was glad she had the chance to make up for the class. She can't move on to the next level in math if she doesn't pass algebra. Summer school isn't easy though. _____（27） During the regular school year, however, she has twenty weeks to do so.Summer school meant that Gabi would be stuck in a hot classroom while most of her friends were at the beach or local amusement parks. Gabi's friends didn't fail any course. _____（28）Going to summer school also meant that Gabi's family had to change their summer vacation plans.Gabi had to be in summer school from 9 a.m. to noon. _____（29）She had to be on the bus at least an hour before class started or else she would be late. The classrooms were hot since the school building was old and did not have air conditioning. When Gabi came home from school, she couldn't do whatever she wanted. She had homework to do.This was the first time Gabi had to go to summer school. _____（30）She made a promise to herself. In the fall, when regular classes begin again, she will try her hardest to pass all the courses.30._____.