The bed wood.

, she told a lie.

tourists come to Guangzhou every year.

    Some countries are building a great wall of trees across Africa. It is called the Great Green Wall. The aim is to bring life to the dry lands and help to fight the bad environment.

    The wall is about 8,000 kilometers long and about 15 kilometers wide. It covers from Senegal in the west to Djibouti in the east, on the south of the Sahara Desert (撒哈拉沙漠). So far, Senegal has made the best progress by planting about 11,000,000 trees.

    Many years ago, there were few trees in that area and the winds used to be very strong. It was harmful to the fields. Also, there was little rain, so few plants could grow and many people went hungry. Since the tree planting project started, the trees have provided food for the local people and increased the wetness (湿度) of the air. Little by little, there appeared green fields for people to grow plants.

    The project which began in 2007 is supposed to cost a total of 8,000,000,000dollars. Many countries are trying their best to help to continue the planting. So we will be able to see the whole green wall across Africa in the near future!

I the classroom and didn't see anybody.

I like doing sports. It us.

    Every year a large part of rainforests disappears on the Earth. There were lots of plants and animals years ago. But now many of them die. Other animals have to leave and find a new forest to make their home. Why do the rainforests disappear ?

    The main reason is that people destroy rainforests. People cut down many trees in the rainforests every year. They use the trees and paper. Farmers need to grow food and keep animals, so they turn rainforests into farms.

    The drought (旱灾) is bad for rainforests too. In 2010, a big drought happened in the Amazon Rainforest. Rivers dried up and millions of plants and animals died. The drought also made the air the forest fire happened easily. Many animals lost their homes because of the fire.

    It's time to protect the rainforests. All of us should the forests to make the world more beautiful.