1 . Lithium (锂) is called “white gold” for good reason. The metal’s value has been growing sharply over the last several years, in a large part because it is an essential part of batteries as well as several key sustainable technologies where energy storage is of huge significance. As electric cars, wind and solar power have grown into major players in the energy industry, lithium has become key to engineering a future free of fossil (化石) fuels.
But acquiring lithium comes at an enormous cost. It often works like this: Water containing lithium is delivered to the surface from underground and mixed with fresh water. The mixture then sits in pools to get rid of water, leaving the rest of its contents behind as brightly colored “mud”. Then heat and chemical reactions are used to get lithium from that, changing it into powder which is then packaged and shipped to buyers around the world.
Any accident that releases mine contents into surrounding communities or the groundwater supply could have unimaginable long-term impacts. To be specific, indigenous (土著的) communities often bear the damage, and political leaders have typically given little weight to their concerns. In Arizona, for example, an expanding lithium mine is threatening the Hualapai Tribe’s cultural and historic sites. Recently, mining lithium and other precious metals has brought about conflict: How do you ensure the availability of materials essential to the future of renewables while protecting those communities’ rights?
Mining of the metal is expected to increase dramatically in coming years. Over time, experts say, that will reduce greenhouse gas emissions (排放) by making electric cars more affordable and, therefore, more popular. As environmentally conscious consumers buy electric cars in ever-greater numbers, it’s important to be aware of the dirty process that powers those clean air vehicles.
1. What does the author’s intention of writing Paragraph 1?| A．To introduce the background of an event. | B．To explain a complex industrial theory. |
| C．To describe a noticeable recent tendency. | D．To predict the future of a main technology. |
| A．Unexpected material leak. | B．Violent chemical reactions. |
| C．Wrong political decisions. | D．Lithium mine expansion. |
| A．Intolerant. | B．Uncaring. | C．Favorable. | D．Objective. |
| A．High Expense of Lithium Mining | B．Potential Benefit of Using Lithium |
| C．Hidden Threat behind Clean Energy | D．Bright Future of Renewable Resources |
2 . Mount Hood is the highest mountain in Oregon, a state in the western United States. At 3, 400 meters it is attractive to many people, some of whom, of course, run into trouble. Each year 25 to 50 people have accidents or get lost on Mount Hood and need rescue（营救）. Although most of these are understandable accidents, a few result from careless risk-taking.
In one recent case, three experienced climbers went hiking in the middle of a snowstorm in December. Most hikers climb Mount Hood in May or June when the weather conditions are good. But in December, the mountain is covered in snow and ice. Winds up to 135 kilometers per hour blow the snow around, making it difficult to see. Temperatures can drop below freezing. As one rescue worker put it, "What were they thinking? They were just asking for it. "
During a rescue a few years ago, a helicopter full of rescue workers crashed and the rescue workers were almost killed. Linda Carle, who lives in the Mount Hood area, asks, If someone made a muddled decision, why should rescue teams have to risk their lives to save them? Why do people take unnecessary risks and do things that aren't right if they know that they can get into trouble? "
Most of the Mount Hood rescue workers are either volunteers or part of the local police department There is no charge for these rescues. It is the taxpayers who pay the bill. Linda Carle suggests that people who take careless risks and need rescue should ay for the rescue. She fees it is only fir that costs for things like damaged helicopters and medical care for rescuers should be paid for by the people who take the risks. What would you do if you were the local police officer at Mount Hood?
1. What can we learn about Mount Hood?| A．It lies in the west of the United States. |
| B．It is the highest mountain in the United States. |
| C．The best time to climb the mountain is from May to July. |
| D．Hundreds of people get lot in the mountain every year. |
| A．poor | B．important | C．wise | D．clear |
| A．Taxpayers | B．Risk takers | C．Government | D．Police |
| A．Advice on stopping people from climbing Mount Hood. |
| B．Other serious accidents in Mount Hood. |
| C．The requirements of becoming a volunteer. |
| D．Some possible ways to solve the problem of rescue costs. |
