“绿色长城”让世界更美好

In 1620, about half the USA was covered by forests. But today many forests have gone. China doesn’t want to copy the USA’s example. We are planting more and more trees. We have built the “Great Green Wall” of trees across northern part 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 earth away. More “Great Green Walls” are needed. Trees must be grown all over the world. The Great Green Walls will make the world better.

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1.In 1620, about ______ of the USA was covered by forests.

A 17%

B 40%

C 50%

D 70%

解析：选C。细节理解题。根据第一句In 1620, about half the USA was covered by forests.可知在1620年，美国大约一半的土地被森林覆盖，故选C。

2.How long is the Great Green Wall?

A 400 kilometers.

B 700 kilometers.

C 2,100 kilometers.

D 7,000 kilometers.

解析：选D。细节理解题。根据第六句The Great Green Wall is 7,000 kilometers long, and between 400 and 1,700 kilometers wide.可知“绿色长城”有7000公里长，宽400至1700公里，故选D。

3.Which of the following is TRUE?

A The wall stops the wind from blowing earth away.

B We are planting fewer and fewer trees.

C China wants to copy USA’s example.

D We built the “Great Green Walls” in northern China.

解析：选A。A 细节理解题。根据倒数第四句可知A正确，根据第三、四、五句可知B、C、D不正确，故选A。

4.Where should trees be planted?

A In the USA.

B In China.

C In northern China.

D All over the world.

解析：选D。细节理解题。根据倒数第二句Trees must be grown all over the world.可知全世界都必须种植树木，故选D。

5._____ will make the world better.

A Tall buildings

B The Great Wall

C The Great Green Walls

D Flowers and animals

解析：选C。细节理解题。根据最后一句The Great Green Walls will make the world better.可知“绿色长城”将使世界变得更美好，故选C。