1. (2020六下·深圳期末) 阅读理解

    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 a lot of 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 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 nicer.

1. （1） In 1620, about ___________________ the USA was covered by forests.

   A . a third B . half C . two thirds
3. （2） A lot of good land has gone with ___________________.

   A . sand B . water C . forests
5. （3） The Great Green Wall in China is ___________________ long.

   A . 7,000 kilometers B . 1,700 kilometers C . 7,000 meters
7. （4） Trees must be grown in ___________________.

   A . China B . the USA C . all over the world
9. （5） ___________________ will make the world nicer.

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