Question

【題目】語法填空
閱讀下面短文，按照句子結構的語法性和上下文連貫的要求，在空格處填入一個適當?shù)脑~或者使用括號中詞語的正確形式填空。
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）時間狀語是now，主語one fifth of the Earth's surface是第三人稱單數(shù)，故填 is。
（2）前面有be 動詞is ，故用現(xiàn)在進行時，填 changing。
（3）用where 引導定語從句。
（4）盡管沙漠中不經(jīng)常下雨，故填 Although。
（5）有時可能會突然有大雨。句末用副詞 suddenly。
（6）the sun 是第三人稱單數(shù)，故動詞用 goes。
（7）根據(jù)后面的 by the ground 可以推斷此處是過去分詞作后置定語，故填 received。
（8）用副詞 quickly修飾后面的動詞disappears，表示迅速消失。
（9）用固定短語 because of +名詞，意思是：由于這些變化。
（10）prevent ……from doing 表示阻止……，故填 spreading。植樹可以防止沙子擴散。