It is 5 June, World Environment Day (WED). Our class goes to a forest park to learn more about trees.

Trees keep the air clean. They take in harmful gases from the air and produce oxygen for us to breathe. They are main fighters against air pollution. We get fruit and oil from trees. Tea also comes from leaves of trees. Lots of tables and chairs are made of wood. We cannot imagine a world without trees.

However, in many parts of the world, people cut down huge areas of forests. It raises the temperature, causes animals to move or die and turns farmlands into deserts. So, China started a tree-planting program and has planted more trees than the rest of the world in the last 50 years. Who are some of the people behind the achievement? Let’s find out.

In Jiangxi Province, Zou Lianying has been planting trees on her land since the age of 64. She sold her cows and pigs and borrowed money to open a forest farm. The farm has more than 8 million trees. But she won’t cut down even one tree and still lives very simply. She believes the forest she is planting will be a gift to future generations.

Near Beijing, Wei Guiying and a team of helpers have planted millions of trees. They have been working at this for more than 20 years. It hasn’t been easy for her. She also borrowed money to do this. Seeing millions of trees around her, she says proudly, “I’m a millionaire.”

1.1. How does the writer’s class celebrate WED?

A By picking fruit.

B By making chairs.

C By planting trees.

D By visiting a park.

解析：选D。细节理解题。根据文中“It is 5 June, World Environment Day (WED). Our class goes to a forest park to learn more about trees.”，作者班级在世界环境日去森林公园了解更多关于树木的知识，也就是参观公园。所以选D。

2.2. What does Paragraph 2 mainly tell us?

A It’s important to keep trees clean.

B It’s hard to live without trees.

C People cut down huge areas of trees.

D There are different kinds of trees.

解析：选B。主旨大意题。第二段介绍树木净化空气、制造氧气、提供果实、木材等多种用处，最后一句“We cannot imagine a world without trees.”点明没有树木我们难以生存，重在说明树木十分重要，离开树木很难生活。所以选B。

3.3. How long has China’s tree-planting program lasted?

A 8 years.

B 20 years.

C 50 years.

D 64 years.

解析：选C。细节理解题。根据文中“So, China started a tree-planting program and has planted more trees than the rest of the world in the last 50 years.”，中国的植树项目已经持续 50 年。所以选C。

4.4. What do Zou Lianying and Wei Guiying have in common?

A They are heroes of planting trees.

B They plant trees to make money.

C They have their own forest farms.

D They make a living by selling trees.

解析：选A。推理判断题。文中介绍邹莲英和魏桂英都坚持多年植树，为绿化贡献巨大，她们都是植树英雄。B、D错误，她们不是为了赚钱卖树；C错误，只有邹莲英有林场。所以选A。

5.5. What does Wei Guiying mean by saying “I’m a millionaire.”?

A She has become a rich woman.

B She wants to thank her helpers.

C She is proud of her achievement.

D She can return the borrowed money.

解析：选C。推理判断题。根据文中“Seeing millions of trees around her, she says proudly,‘I’m a millionaire.’”，看到亲手种下的大片树林，她十分自豪。这里的百万富翁不是指有钱，而是为自己植树的成果感到骄傲。所以选C。