题型：语法填空（语篇） 题类：常考题 难易度：普通
牛津版（深圳•广州）初中英语八年级下册Module 4 Unit 7 Unit 7 单元综合能力检测题（音频暂未更新）
More than millions of years ago, there were deserts. Now about one fifth of the Earth's surface (be) deserts. The size of the world's deserts keeps (change). Deserts can be hot or cold. The Australian Desert is a hot desert, while the Gobi Desert is a cold desert. A desert is a very dry land and there is hardly any rain. The Sahara Desert in Africa receives less than 1.5 cm a year. it doesn't rain very often in deserts, sometimes even for years, there can be heavy rain suddenly. Because they are dry, deserts have wide changes in temperature each day. When the Sun goes up, it is very hot, even hot enough (fry) an egg on the ground. At night, the heat that (receive) by the ground during the day disappears (quick), and then it gets cold that water would turn into ice. Because the change, living in the desert is very difficult. Man can make deserts, but man can also stop (they) from getting larger and larger. Planting trees can prevent the sand from (spread).
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