Caring for Mother Earth

We humans live in different parts of the world, but we have the same “mother”. She gives us everything we need in our daily life. She is our Mother Earth.
April 22 is Earth Day. The theme（主题）of this year is “Green Cities.” A green city is a healthy and pleasant place for people to live. Around the world, many cities and countries have done well to build themselves in a green way.

	Chicago is well known for its green roof program. These roofs are covered with plants. The plants get a lot of rainwater. So far, there are about 360 green roofs in Chicago, according to the US Environmental Protection Agency.
	Curitiba, Brazil, has great transportation. It opened the world’s first bus rapid transit(BRT) system in 1974. BRT runs on special lanes. This makes sure that buses are on time even in traffic jams. With the help of BRT, the city has the lowest level of air pollution in Brazil.
	In Singapore, almost everyone knows the zero-energy buildings in Southeast Asia. Zero energy means a building is able to create more energy than it uses. By 2030, Singapore plans to build 80 percent of its buildings like this.

 
【小题1】The theme of Earth Day for this year is ______ .

A．Green Roofs	B．Great Transportation
C．Green Cities	D．Environmental Protection

【小题2】Which country opened the world’s first BRT system in 1974?

A．America.

B．Brazil.

C．Mexico.

D．Singapore.

【小题3】What is Singapore famous for ?

A．Special transit system.	B．The level of air pollution.
C．Cool and clean water.	D．The zero-energy buildings.