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When we think of leaders, we may think of people such as Abraham Lincoln, Susan Anthony, or Martin Luther King, Jr. If you consider the historical importance and far-reaching influence of these individuals, leadership might seem like a noble and admirable ______. But like all of us, these people started out as students, workers, and citizens who ______. Through diligence and experience, they improved upon their ideas by ______ with others, seeking their opinions, and constantly looking for the best way to accomplish goals for a group. Thus we all have the potential to be leaders at school, in our communities, and at work, no matter what age or experience level. Leaders are crucial at every level of an organization; cultivating leadership skills early is a great way to pave the way for success. Many people have no desire to be leaders; after all, leadership comes with many responsibilities and risks that other members of a team do not have to worry about. Thus some people are more comfortable in the role of contributor. However, in much of today's world, teamwork is essential ______ and assignments, and teams without leaders usually are ineffective in achieving their goals. They struggle and may fail without a leader's help to focus on the goal and to make choices that will move the team toward that goal. In school and extracurricular (课外的) activities, you may be able to avoid the responsibilities of leadership: Someone else usually will step forward to take on a leadership role. But in the workplace, the choice will not always be yours. When you are assigned a project, you will most likely need to rely on the help and support of others. These people, in effect, become your team. To get the most out of their efforts, you will need to exercise good leadership. Leaders inspire others to act by setting good examples. Their determination and perseverance encourage others. Leaders try to be the best they can be — not to compete with others. In fact, a leader's job is to help others make their best contribution toward a shared goal. Leaders motivate others by trusting each other. The leader must trust in his or her teammates' abilities and willingness to pursue a goal. At the same time, the team must trust in their leader's ability and willingness to provide needed support. This mutual (相互的) trust is extremely necessary in building a team that will be successful in reaching its goal.【缺少答案,请补充】
Mr Mandela shocked his colleagues when, at 33, he announced that he looked forward to becoming South Africa's first black president. Yet he did not expect rewards; even when he was a world-famous figure he was modest, and seldom took his power for granted. Repeatedly in jail he would refuse privileges if they were offered to him but not to other prisoners. He complained, for instance, about having to wear shorts, one of the ways in which the government embarrassed black prisoners, but rejected the long trousers he was then given until two years later when the government agreed to let his colleagues wear them too. He was proud, it is true, to be related by birth to one of the Thembu kings. Yet he hated to behave like some African "big men", always being embarrassed while in jail on Robben Island that he received more visits than other prisoners, one of whom saw only three visitors in 15 years. As a free man in the 1990s, he chose to live in suburban comfort, and in holidays returned to Qunu, where he had spent the happiest days of his childhood, to build a house based on the design of his quarters in the Victor Verster prison that had held him during his final years as a prisoner. He encouraged no mistaken view of him as a god-like figure. Magnificent museums and statues were alien (陌生的) to him. But flash suits, white silk scarves and a physical-fitness program at least partly designed to maintain a boxer's muscular body shape were not. He would make good use of his appearance. In his youth, his looks and smart suits had done him no harm among women. Later, when he wore a traditional Xhosa leopard-skin cloak, to appear in court, he knew he would deliver a message that "I was a black African walking into a white man's court." The leopard is traditionally considered a Thembu royal symbol, and the cloak is traditionally worn by a Xhosa chief. This proved to be a very powerful surprise. It suited the African National Congress, of which Mr Mandela was a leader, to make a messiah (救星) out of him, first to inspire the masses at home, then to keep spirits up during the long years of political hopelessness. It could have ended badly. The great figure whose defiance (蔑视) so captured the public imagination — Prisoner 466/64 on Robben Island — could have turned out to be a broken man or a paper hero. Instead, he proved to be a remarkably effective politician.【缺少答案,请补充】
Water is life. We depend on it to keep us and the ____ healthy. Nonetheless, many people take water as a natural resource for granted. Today, the situation has changed. As the population of the world increases, and with it the demand for water, there is growing concern that our water supplies will not be as ____ as we think. Eighty countries now have water shortages and 2 billion people lack access to clean water. One billion people lack enough water to simply meet their basic needs. While nearly 70 percent of the world is covered by water, only 2.5 percent of it is fresh. This tiny amount of fresh water available on the planet has remained fairly constant over time and is ____ unevenly around the world. The growth of the world population, therefore, ____ competition for a clean supply of water every year. Worse still, humans are not efficient users. According to the United Nations, water use has grown at more than twice the ____ of population increase in the last century. The reality is that an increasing number of regions are ____ with water scarcity. By 2025, two-thirds of the world’s population may face water shortages. An adequate and ____ water supply is essential to the future of every country. To increase and conserve supplies of fresh water, many countries have been working at technological ____ , one of which is in the process of desalination. New filtration systems have been developed to ____ traditional heating methods. Thus the expected ____ can be achieved: lower costs.
Every time man uses water, it sets off a widening effect that has consequences few people understand. But we can no longer afford to ignore our impact on water supplies. We must accept the new reality and adapt (适应). The good news is that water is renewable: humans may pollute it, overuse it, or allow it to evaporate (蒸发) into the hot sky, but we cannot destroy water. The challenge is to learn how to manage the earth’s limited supply more efficiently and sustainably. The bad news is that people usually resist change until a crisis is underway. In the 1930s, Americans ignored warnings about drought and poor farming practices until the Dust Bowl drove 2.5 million people off the Great Plains. In the 1970s and 1980s, Americans ignored warnings about water pollution until the Cuyahoga River, polluted from decades of industrial waste, caught fire and people were poisoned at Love Canal and elsewhere. In the first decade of this century, Americans ignored warnings that they were polluting and draining important supplies such as the Colorado River, the Everglades, the Great Lakes, the Mississippi, and the Sacramento Delta. Today, water scarcity, population growth, and environmental damaging have combined to force the kind of awareness that the United States has not seen in forty years. In the 1970s, the American environmental movement forced the passage of the Clean Water Act and the Safe Drinking Water Act, and the founding of the Environmental Protection Agency. Thus began a remarkable period of collective action when Americans, for the first time, agreed on the need to protect the nation’s water supply. Nearly half a century after the Clean Water Act was signed in 1972, America and the world face a second significant period in which our actions, and inactions, will have serious consequences for water supplies for years to come. There are plenty of suggestions, and sharp disagreements, over how to respond. One camp favors building up water supplies by increasing the nation’s reservoirs, canals, and pipelines. Another group favors a new water ethic (伦理) built on the opposite approach: conserving existing water supplies and limiting new demand through efficient technologies, strict control, price incentives (刺激), and broad public education.【缺少答案,请补充】