Question

In 1620, about half the U.S.A. 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 U.S.A.’s example. We’re planting more and more trees. We’ve 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 the earth away. It will stop the sand from moving towards the rich farmland in the south. More “Great Green Walls” are needed. Trees must be grown all over the world. Great Green Walls will make the world better.

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

A．a third

B．half

C．two thirds

D．a fourth

2. A lot of good land has gone with ______.

A．sand

B．water

C．wind

D．forests

3. The Great Green Wall in China is ______ long.

A．7,000 kilometers	B．1,700 kilometers
C．7,000 meters	D．400 kilometers

4. Trees must be grown in ______.

A．China	B．the USA
C．some countries	D．every part of the world

5. ______ will make the world better.

A．The Great Wall	B．Tall buildings
C．Great Green Walls	D．Flowers and grass

Answer

1.B

2.D

3.A

4.D

5.C

【解析】

1.细节理解题，根据文中语句“In 1620, about half the U.S.A. was covered by forests.”理解可知。在1620美国的一半领土被森林所覆盖，故选B。

2.细节理解题，根据文中语句“Today the forests have almost gone. A lot of good land has gone with them,”理解可知。良田随着森林的消失而消失，故选D。

3.细节理解题，根据文中语句“The Great Green Wall is 7,000 kilometers long, and between 400 and 1,700 kilometers wide.”理解可知。中国的绿色长城大约有7000公里长，故选A。

4.细节理解题，根据文中语句“Trees must be grown all over the world.”理解可知。树木的缺乏是整个世界所面临的问题，故选D。

5.细节理解题，根据文中语句“Great Green Walls will make the world better.”理解可知。建造防护林能改变现在的森林覆盖率的现状。