三、句子还原
KEY→P21
范畴:人与自然
主题:自然环境
体裁:说明文
难度:★★★
建议用时:6分钟
评价:/5
阅读下面短文,从短文后所给的选项中选出能填入短文空白处的最佳选项。选项中有一项是多余选项。
We've all seen deserts in the movies. They are full of miles and miles of sand. However, not all deserts are like this. Many deserts are rocky with some plants. 1.

Deserts appear mainly because of the lack of rain. Deserts have dry soil, with little or no surface water, and high evaporation(蒸发). They are so dry that sometimes rain evaporates before it can hit the ground!
Because deserts are so dry and their humidity is so low, they have little cover to help protect the ground. 2. But they don't hold the heat overnight. Many deserts can quickly get cold once the sun goes down. In some deserts, the temperature can reach over 100 degrees F during the day and then drop below freezing during the night.
Animals are used to living in the desert although it has terrible temperatures and is short of water. 3. They come out when it is cooler at night. These animals sleep in holes or tunnels under the ground in order to stay cool.
Only some kinds of plants can live in deserts. 4. Most of these plants have a way to store water in their stems, leaves, or trunks so they can live a long time without water. They also have large root(根) systems so they can gather up all the possible water when it rains.
5. This is called desertification(沙漠化) and is caused by different factors including human activities.
A. You won't see a lot of tall trees in the desert.
B. There are even deserts that are icy and cold.
C. Many of the animals sleep during the day.
D. We all know that there are no humans living in deserts.
E. Deserts cover around 20% of the world's land, and they are growing.
F. As a result, they may get very hot during the day with the sun beating down.
英语嗨吧

沙漠干旱缺水,昼夜温差很大;沙漠中,物竞天择适者生存,动植物分别用自己特有的方式储水,适应沙漠干旱气候。沙漠占陆地面积20%,防止沙漠化,是人类面临的艰巨任务。
1. B 上文提及"并非所有沙漠都是绵延不绝的沙地,许多沙漠地表多为岩石,并存在植物",下文用 even 进一步强调:甚至存在冰封寒冷的沙漠环境。
2. F 下文表示转折"但沙漠晚上不能保温",上文对应表示:在白天太阳照射下,沙漠可能会变得很热。
3. C 下文提及"动物在晚上凉爽的时候出来。"上文对应表示:许多动物在白天睡觉。
4. A 上文提及"只有一些植物可以生活在沙漠中",下文对应表示:你不会在沙漠中看到很多高大的树木。
5. E 下文提及不同的因素导致沙漠化,上文对应表示:沙漠覆盖了世界上大约20%的土地,且它们还在增长。