答案解析
What is the approximate area of the Amazon rainforest?
A. 5 million square kilometres
B. 6 million square kilometres
C. 7 million square kilometres
D. 8 million square kilometres
B（原文：“With an area of around 6 million square kilometres”）
How much longer is the Amazon River than the Yangtze River?
A. 90 kilometres
B. 100 kilometres
C. 110 kilometres
D. 120 kilometres
B（原文：“roughly 100 kilometres longer than the Yangtze River”）
According to the passage, how many plant species can be found in the Amazon rainforest?
A. About 30,000
B. Over 40,000
C. Nearly 50,000
D. More than 60,000
B（原文：“Of the 390,000 plant species known to us, more than 40,000 can be found in the Amazon”）
What is the main idea of Paragraph 3?
A. The Amazon rainforest provides habitats for different wildlife at various levels.
B. The Amazon rainforest has a complex system of roots and leaf litter.
C. The tallest trees in the Amazon form the top level of the forest.
D. Different plants in the Amazon have unique characteristics.
A（第三段主要描述森林不同层次为不同生物提供栖息地，如底层根系、落叶层、矮植物、高大树木等）
Why is the Amazon rainforest called the “lungs of the planet”?
A. It produces over 20% of the Earth’s oxygen and fixes carbon.
B. It is home to the largest number of animal species.
C. It prevents global warming by absorbing pollutants.
D. It supports the survival of jaguars and other large animals.
A（原文：“The Amazon rainforest breathes life into the planet by fixing carbon and producing over 20 per cent of all the Earth’s oxygen. Thus, it is often known as the ‘lungs of the planet’”）