They solved the problem in the end. Yet I really don’t know ________.

A. how did they make it

B. how they made it

C. why did they make it

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Save the world’s trees

“When it comes to the Earth, there is no time to waste.” says the Earth Day Network. And that is right. Protecting our environment is very important, and World Earth Day was created in 1970 to ask more people to protect our environment. On April 22, people around the world celebrate Earth Day.

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That’s a big goal, and you might wonder why trees are so important. Because they can take in carbon dioxide (CO2) and protect the air quality(質(zhì)量). CO2 is a chemical in our atmosphere, but humans make too much of it. Each person makes about 2.3 tons a year, which is bad for the environment.

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But don’t forget that we can also help the environment by cutting down on how much energy(能源) or water we use every day. Every little thing helps.

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________________________________________

2.What is the topic of Earth Day?

________________________________________

3.Why are trees so important to the earth?

________________________________________

4.How much CO2 can two trees take in each year?

________________________________________

英譯漢

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_________________________________________________________________________

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