Scientists tell how healthy rainforests are by listening to the sounds of their wildlife. A healthy forest is alive with animal calls and birdsong but an unhealthy forest is much quieter. However, that is a big job. Researchers can make thousands of hours of recordings but then someone has to listen to them all and pick out the different animal and bird calls.

What if that someone is an AI though? Scientists are using AI technology to help with the task. Through the new Forest Listeners web experiment, scientists want people around the world—including you—to help too.

The site gets you to move around a virtual (虚拟的) forest, listening for wildlife. When you find a new species (物种), you listen to its song until you can remember it. The next step is to listen to real forest recordings (there are more than 1.2 million of them), and decide for each one whether you can tell that animal call or not, or if you’re not sure.

The answers people give are then used to train AI to tell what animals they are by their sounds. Scientists say that the project helps them process a huge number of recordings. Without AI, it would take many years to study them all. “Every sound tagged (贴标签) by a forest listener helps train our AI models,” the scientists said. “This group effort provides us with valuable information, allowing us to find out small changes in species’ presence and behavior. These are important signs for a healthy forest.”

1.1.What is a healthy rainforest according to the text?

A A quiet forest.

B A forest with new species.

C A forest full of wildlife sounds.

D

解析：选C。题型：细节理解题 解析：原文第一段 “A healthy forest is alive with animal calls and birdsong”，健康雨林充满鸟兽声响。A 安静森林是不健康的；B 有新物种，文中未提及。

2.2.What does the underlined word “that” refer to in Paragraph 1?

A Recording wildlife sounds.

B Comparing different animal calls.

C Checking forest health by listening.

D

解析：选C。题型：代词指代题 解析：that 指代前文内容：通过听野生动物声音判断雨林健康。A 录制声音、B 对比叫声，都不是 that 指代对象。

3.3.What is the right order of the experiment? a. Give information to train AI. b. Listen for wildlife in a virtual forest. c. Listen to real forests and tag each sound.

A a-b-c

B b-c-a

C c-a-b

D

解析：选B。题型：事件排序题 解析：顺序：b 在虚拟森林聆听野生动物 → c 听真实森林录音并标记声音 → a 提供数据训练 AI。对应 b-c-a。

4.4.How does AI help the scientists?

A By dealing with recordings quickly.

B By remembering new species’ sounds.

C By inviting more people to care for forests.

D

解析：选A。题型：细节理解题 解析：文中 “the project helps them process a huge number of recordings. Without AI, it would take many years to study them all.” AI 可以快速处理大量录音。B 是人记住物种声音；C 邀请人不是 AI 做的事。

5.5.What is the main idea of the text?

A Forests are in danger now.

B Helping forests is helping humans.

C Humans together with AI protect forests.

D

解析：选C。题型：主旨大意题 解析：文章讲述人类志愿者和 AI 一起，通过声音监测雨林生态、保护森林。A 森林濒危、B 护林就是保护人类，均不是文章主旨。