1 . Forty-nine years ago, on April 22,1970, twenty million Americans took to the streets to voice their concern about the deteriorating environment. The movement led to Earth Day.

Unfortunately, our planet is in worse shape now than it was when Earth Day was first celebrated. The good news is that it’s still not too late to reverse (转变) climate change if we all do our part. This Earth Day, take the first step towards helping our planet by participating in one of these fun activities.

NASA is putting our planet up for adoption so you and your friend can claim a portion of the planet as your own. The space agency has divided the globe into 64,000 sections, each about 55 miles wide. All you have to do is type your name into NASA’s “Adopt the Planet” site to claim a certificate that will give you the location of your slice of paradise (天堂) complete with details of its environment. NASA hopes that this exercise will stimulate interest and care in our planet.

Search giant Google is also trying to engage the public with an updated Google Earth focused around Earth Day events. Through a new Voyager feature, users will be able to discover stories from around the world, learn about new places by reading “Knowledge Cards” and send postcards.

If you happen to be anywhere near the nation’s capital on April 22, join the millions that are expected to participate in the Earth Day March at the National Mall. The mission of the event that will feature guest speakers and musical performances is to mobilize (动员) citizens into taking action by promoting this year’s Earth Day theme: climate and environmental science literacy.

While participating in the above-mentioned activities is a great idea, it is just the beginning. All that is required are small lifestyle changes. Planting a tree or two, going meatless just one day a week, or switching your plastic water bottle for a reusable one will go a long way to help reverse the damage we have caused.

1. The underlined word “deteriorating” is the closest in meaning to ________.

A．cleaner	B．better
C．worse	D．colder

2. If you participate in the activity of “Adopt the Planet”, you will be probably provided with your slice's information about ________.

A．air quality	B．ancient history
C．local customs	D．tourist attractions

3. Through Voyager on Google Earth, what can users do?

A．They can create “Knowledge Cards” online.

B．They can discover stories from around the world.

C．They can receive postcards coming from Google.

D．They can adopt a slice of paradise in the world.

4. In the last paragraph, the writer calls on people to ________.

A．dream big	B．fly high
C．go meatless	D．start small