| A．The weather. | B．Football games. | C．A weekend plan. |
2 . More than 11,000 scientists are warning that the Earth, in their words, "clearly and unequivocally （明确地）faces a climate emergency.” The scientists represent several fields of study and come from 150 countries around the world. They approved a report that appeared in the publication Bioscience earlier this month. It warns that the world would face "untold human suffering" if it does not make deep and lasting shifts in human activities that influence climate change. Three leaders of the study are from the United States. They worked on the study with scientists from universities in South Africa and Australia. This is the first time a large group of scientists have jointly （共同地）used the word "emergency" when talking about climate change.
"Despite 40 years of global climate negotiations ...we have generally conducted business as usual and have largely failed to address this worrying situation,” the study said. “Climate change has arrived and is accelerating faster than many scientists expected."
The report identified five areas that the world needs to deal with immediately. The scientists appealed to nations to use energy more efficiently and cut their use of fossil fuels. They suggested that lawmakers approve taxes on the burning of carbon-based fuels, such as coal, oil and natural gas. The report urges people to move toward more of a plant-based diet. Other areas of concern include preventing the destruction of forests and permanent loss of some plant and animal species. The report noted that it will most likely take strong actions by the public to move politicians to approve lasting policy changes.
The scientists added, "We believe that the prospects （前景）will be greatest if decision-makers and all of humanity quickly respond to this warning and declaration of a climate emergency, and act to support life on planet Earth, our only home.”
1. What will happen to people if they don't stop the activities that influence the climate change?| A．They will have no places to live in. |
| B．They will be fined and lose their jobs. |
| C．They will become bored with their life. |
| D．They will go through a lot of sufferings. |
| A．They have ignored the scientists’ warning, |
| B．They have solved the problem successfully. |
| C．They have talked too much but done too little. |
| D．They have realized the problem isn’t that serious. |
| A．Paragraph 1. | B．Paragraph 2. |
| C．Paragraph 3. | D．Paragraph 4. |
| A．Scientists' Hard Work of Saving the Earth |
| B．l he Important Reasons of Climate Change |
| C．The Impact of Human Activities on Climate |
| D．Scientists' Warning of a Climate Emergency |
3 . By the end of the century, if not sooner, the world’s oceans will be bluer and greener thanks to a warming climate, according to a new study.
At the heart of the phenomenon lie tiny marine microorganisms(海洋微生物) called phytoplankton. Because of the way light reflects off the organisms, these phytoplankton create colourful patterns at the ocean surface. Ocean colour varies from green to blue, depending on the type and concentration of phytoplankton. Climate change will fuel the growth of phytoplankton in some areas, while reducing it in other spots, leading to changes in the ocean’s appearance.
Phytoplankton live at the ocean surface, where they pull carbon dioxide(二氧化碳) into the ocean while giving off oxygen. When these organisms die, they bury carbon in the deep ocean, an important process that helps to regulate the global climate. But phytoplankton are vulnerable to the ocean’s warming trend. Warming changes key characteristics of the ocean and can affect phytoplankton growth, since they need not only sunlight and carbon dioxide to grow, but also nutrients.
Stephanie Dutkiewicz, a scientist in MIT’s Center for Global Change Science, built a climate model that projects changes to the oceans throughout the century. In a world that warms up by 3℃, it found that multiple changes to the colour of the oceans would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters, such as those of the Arctic, a warming will make conditions riper for phytoplankton, and these areas will turn greener. “Not only are the quantities of phytoplankton in the ocean changing. ” she said, “but the type of phytoplankton is changing.”
And why does that matter? Phytoplankton are the base of the food web. If certain kinds begin to disappear from the ocean, Dutkiewicz said, “it will change the type of fish that will be able to survive.” Those kinds of changes could affect the food chain.
Whatever colour changes the ocean experiences in the coming decades will probably be too gradual and unnoticeable, but they could mean significant changes. “It’ll be a while before we can statistically show that the changes are happening because of climate change,” Dutkiewicz said, “but the change in the colour of the ocean will be one of the early warning signals that we really have changed our planet.”
1. What are the first two paragraphs mainly about?| A．The various patterns at the ocean surface. |
| B．The cause of the changes in ocean colour. |
| C．The way light reflects off marine organisms. |
| D．The efforts to fuel the growth of phytoplankton. |
| A．Sensitive. | B．Beneficial. | C．Significant. | D．Unnoticeable. |
| A．Phytoplankton play a declining role in the marine ecosystem. |
| B．Dutkiewicz’s model aims to project phytoplankton changes. |
| C．Phytoplankton have been used to control global climate. |
| D．Oceans with more phytoplankton may appear greener. |
| A．To assess the consequences of ocean colour changes. |
| B．To analyse the composition of the ocean food chain. |
| C．To explain the effects of climate change on oceans. |
| D．To introduce a new method to study phytoplankton. |
