The Sahara is the largest desert in the world. It has one of the most terrible environments on the earth. It covers an area of about 600, 000 square kilometers. This is nearly the whole size of the United States.

The huge desert spans（横跨）11 countries. So it has many different land features（地貌特征）. The most famous and beautiful one is the golden sand dune fields（沙丘地）. Other land features include mountains, plateaus（高原）and so on. Some of the mountains have snow in winter. Thousands of years ago, the Sahara was not a desert at all. There were many plants and rivers. As the weather changed, it became hot and dry. Although the natural conditions are terrible, there are many plants and animals like snakes, foxes and birds living there. In some places, people grow fruit. Plants can grow there because their roots（根）can reach deep underground to get water.

More than 2,000,000 people live in the Sahara. Some of them move around from place to place with their camels. Others live in towns and cities. Camels are known as the “ships of the desert”. They can travel more than a week without water or food in the desert.

The desert is not always hot. The temperature changes a lot in a day in the Sahara. And the sunshine is strong there. So people have to prepare well if they plan to visit it.

根据短文内容，判断句子正（T）、误（F）。
【小题1】The Sahara Desert is 9 times larger than the United States in area.
【小题2】Thousands of years ago, the Sahara was not a desert at all.
【小题3】There are no living things in Sahara Desert because of the bad natural conditions.
【小题4】People in the Sahara can move around from place to place with camels.
【小题5】The temperature in the Sahara Desert is not always high.