In 1620,about half the USA was covered by forests .Today the forests have almost gone .A lot of good land has gone with them ,leaving only sand .China doesn’t want to copy the USA’s example.We’re planting more and more tress .We’ve built the “Great Green Wall ”of tress across northern pat of our country .The “Great Green Wall”is 7,000 kilometers long ,and between 400 and 1,700 kilometers wide .It will stop the wind from blowing the earth away .It will stop the sand from moving towards the rich farmland in the south .More “Great Green Wall ”are needed .Trees must be grown all over the world. “Great Green Wall ”will make the world better .
根据短文内容，选择正确答案。
【小题1】In 1620 ,about_____ the USA was covered by forests
| A．a third | B．half | C．to thirds | D．a fourth |
| A．sand | B．water | C．wind | D．forests |
| A．7,000 kilometers | B．1,700 kilometers |
| C．7,000 meters | D．400 kilometers |
| A．China | B．the USA |
| C．some countries | D．every part of the world |
| A．the Great Wall | B．Tall buildings |
| C．Great Green Wall | D．Flowers and glass |
【小题1】B
【小题2】D
【小题3】A
【小题4】D
【小题5】C.
解析试题分析:
【小题1】根据In 1620,about half the USA was covered by forests .可知选B。
【小题2】根据Today the forests have almost gone .A lot of good land has gone with them。Them指代的是上文提到的the forests，故选D。
【小题3】根据The “Great Green Wall”is 7,000 kilometers long ,可知选A。
【小题4】根据Trees must be grown all over the world.可知选D。
【小题5】根据“Great Green Wall ”will make the world better .可知选C。
考点：关于环保的说明文
点评：本文首先介绍了美国的森林的森林遭到破坏后的结果，然后重点介绍了中国的北方的绿色长城工程。号召人们多植树，保护环境，很有教育意义。
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What will the house look like in the future? Could it have gardens on its walls, or a pool with fish for dinner? Architects（建筑师） believe that they are all possible. The only thing for sure is that the houses will be as green as possible.
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阅读理解
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| A．not to work on No Car Day |
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| C．to leave their cars at home for repair |
| D．to ride a bike or walk instead of driving to work |
| A．52 | B．63 | C．41 | D．238 |
| A．cars | B．dust | C．weather | D．rubbish |
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