题目内容：

    Global（全球的）warming is a big problem now. One of the best things to stop it is to plant more trees. Trees can take in CO2 in the air. China is doing a great job of "greening" the world. A team of scientists at Boston University used a special camera and found that the global leaf area had increased by 5 percent since the early 2000s. And China was responsible for 25% of that. For example, since 1962, China has planted trees in Saihanba, Hebei Province. It was once a desert. But now, China has turned this place into the country's largest man—made forest.

Ant Forest, a program in Alipay app, also plays a part of planting trees. It gives users points for doing eco—friendly activities on the Alipay platform（平台）to encourage people to live a low—carbon（低碳）life. The activities include walking instead of driving, paying on Alipay, buying tickets online, taking buses or subways and so on. Users can use these points to water and grow their own virtual（虚拟的）trees. When the virtual trees are big enough, Ant Forest will plant real trees somewhere in China. More than 55 million trees have been planted in this way. Ant Forest is very popular with online users. Now 230 million people are planting virtual trees on their mobile phones. It is believed that everyone wants to protect the environment. Ant Forest uses technology to make it come true.

1.________is a good way to stop global warming.

A.Planting trees B.Making cards C.Visiting deserts

2.According to the scientists at Boston University, we know ________.

A.global warming can't be stopped

B.there is less and less green land on the earth

C.China has had more leaf areas since 2000s

3.How can people have points on Ant Forest?

A.By paying or buying online.

B.By driving or taking a car.

C.By watering or growing trees.

4.Which of the following statements is NOT true?

A.More and more people use Ant Forest.

B.Ant Forest grows real trees for users.

C.People grow real trees on Ant Forest.

5.Which is the best title of the passage?

A.Ant Forest B.Global Warming C.Go Green, China