(练习)unit6 微阶段刷题过关卷(十二)-【提分教练】2022-2023学年新教材高中英语选择性必修第二册(外研版2019)

微阶段刷题过关卷（十二） (时间：70分钟　分值：85分) Unit 6　Developing ideas & Presenting ideas 第Ⅰ卷(满分25分) Ⅰ. 阅读理解(共4小题；每小题2.5分，满分10分) Nature is like a great magician, performing wonders on Earth. One of them is the Amazon rainforest, the world's largest rainforest and home to millions of plants and animals. Nicknamed “the lungs of our planet”， it generates about one­fifth of Earth's oxygen. However, this wonderful natural wonder is currently in danger. Thousands of fires have broken out in Brazil, endangering much of the rainforest. These blazes have lasted several weeks and are believed to be the “most intense” in almost a decade, according to BBC News. The Amazon saw a large number of fires in 2019. Between January and August, there were over 74，000 fires — the highest number since 2013, the BBC reported. Forest fires are common during the dry season, which runs from July to October. They are usually caused by natural events, such as lightning strikes. However, most of the recent fires are believed to be caused by farmers, who use fire as a traditional part of tropical agriculture to clean land, reported CNN. The disaster has raised concern around the world. The Amazon rainforest is important for preventing climate change, said the BBC, absorbing millions of tons of carbon annually. When trees are cut down or burned, the rainforest's capacity (能力) to absorb carbon is reduced. Brazilian climate expert Carlos Nobre tells Reuters he's worried. If more than 20 percent of the ecosystem is destroyed, the Amazon rainforest could reach a “tipping point (临界点)” where the thick jungle will turn into a tropical savannah (大草原)． Nobre warns that it is not far off, with between 15 and 17 percent of the rainforest having already been destroyed. The Brazilian government has sent soldiers to fight the fires. Many people and celebrities have offered their support and called for recovery efforts. The public are also encouraged to donate to charities concerned with rainforest preservation (保护). “Every li