In 1620,about half the USA was covered by forests .Today the forests have almost gone .A

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 forestsA．a thirdB．halfC．to thirdsD．a fourth【小题2】 A lot of good land has gone with .A．sand B．waterC．windD．forests【小题3】 The “Great Green Wall”In China is longA．7,000 kilometersB．1,700 kilometersC．7,000 metersD．400 kilometers【小题4】 Trees must be grown in .A．ChinaB．the USAC．some countriesD．every part of the world【小题5】 will make the world better .A．the Great WallB．Tall buildingsC．Great Green WallD．Flowers and glassB

(答案→)B 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。

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