Question

【题目】语法填空
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或者使用括号中词语的正确形式填空。
Over 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 is always (change). Deserts can be hot or cold. The Australian Desert is a hot desert, while the Gobi Desert in Mongolia is an example of a cold desert. Deserts are dry areas less than 50 cm of rain falls each year. The Sahara Desert in Africa receives less than 1.5 cm a year. rain doesn't fall very often in deserts, sometimes even for years, there can be heavy rain (sudden). Because they are dry, deserts have wide changes in temperature each day. When the sun (go) up, it is very hot. At night, the heat (receive) by the ground during the day (quick) disappears(消失), and then it becomes very cold. Because the change, living in the desert is very difficult. Man can make deserts, but they can also stop them from getting larger and larger. Planting trees can prevent the sand from (spread).

Answer 1

【答案】is；changing；where；Although；suddenly；goes；received；quickly；of；spreading
【解析】
（1）时间状语是now，主语one fifth of the Earth's surface是第三人称单数，故填 is。
（2）前面有be 动词is ，故用现在进行时，填 changing。
（3）用where 引导定语从句。
（4）尽管沙漠中不经常下雨，故填 Although。
（5）有时可能会突然有大雨。句末用副词 suddenly。
（6）the sun 是第三人称单数，故动词用 goes。
（7）根据后面的 by the ground 可以推断此处是过去分词作后置定语，故填 received。
（8）用副词 quickly修饰后面的动词disappears，表示迅速消失。
（9）用固定短语 because of +名词，意思是：由于这些变化。
（10）prevent ……from doing 表示阻止……，故填 spreading。植树可以防止沙子扩散。