写作假设有外星人存在 请你根据以下提示写一篇短文 想象外星人的样子和他们的生活。

2. 阅读下面短文，根据文章大意用所给单词的适当形式填空未提供单词的，限填—词，使文章意思完整、正确。

More than millions of years ago, there were deserts. Now about one fifth of the Earths surface be deserts. The size of the worlds 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 doesnt 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.

写作假设有外星人存在 请你根据以下提示写一篇短文 想象外星人的样子和他们的生活。要求80词左右 可适当发挥。开头已给出 不计入总词数。内容提示： ①外星人生活在其他星球上 他们长着大大的头 有一双大大的眼睛 个子很小；②他们看似弱小 实际很强壮 他们不需要喝水 不需要呼吸 也不需要睡觉；③与人类不同的是 他们总是乘着UFO去他们想去的地方。