Arbor Day is a holiday in which individuals (個(gè)人) and groups are encouraged to plant and care for trees.

In the 1840s， the midwestern state of Nebraska (內(nèi)布拉斯加州) was a territory (領(lǐng)土) within a wide prairie (大草原). When pioneers (拓荒者) moved to settle there， they found few trees to build houses or to burn for fuel (燃料). There was no shade from the sun or wind， and crops did not grow well in the dry earth.

J. Sterling Morton was one of those pioneers. He and his wife planted trees immediately after moving from their hometown. Morton was a journalist (記者)， and later the editor， for Nebraska’s first newspaper. In his writings he advocated (提倡) planting trees to help life on this vast barren (貧瘠的) prairie.

Morton suggested that citizens of the new state of Nebraska set aside April 10 as a day to plant trees at a meeting in January 1872. Everyone welcomed the idea. Nebraskans planted about one million trees on that first Arbor Day.

In 1882， Nebraska declared its own Arbor Day as a legal (合法的) holiday and the date was changed to Morton’s birthday， April 22. Today almost every state celebrates Arbor Day. But because the best tree-planting season changes from region to region， some states celebrate the day on different dates. Hawaiians， for example， plant Arbor Day trees on the first Friday in November!And China plant Arbor Day trees on March 12th every year.

根據(jù)短文內(nèi)容回答問題。

1. Why did Morton and his wife plant trees

after moving to Nebraska?

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2. When did Morton suggest setting a day to

plant trees?

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3. How many trees did Nebraskans plant on

the first Arbor Day?

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4. When did Nebraska declare its own Arbor Day as a legal holiday?

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5. Did all the countries celebrate Arbor Day

on the same day?

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Keys:

1. Because they found few trees to build houses or to burn for fuel. There was no shade from the sun or wind， and crops did not grow well in the dry earth.

2. In January 1872.

3. About one million trees.

4. In 1882.

5. No， they didn’t.