题目内容
阅读下面短文,用适当的词填空。
Trees are useful to human beings in three important ways:they 1 them with food and other produces; they give them 2 ; and they help to 3 floods. 4 in many parts of the world, people haven't realized that the 5 of these services is the most important.To get quick profits from the tree, they have cut them in 6 numbers, only to find that they have 7 their good friends.Two thousand years ago a rich and 8 country cut down its trees to build warships, with which it seized an empire.It gained the empire, 9 , without its trees, its 10 became hard and poor.When the empire fell to pieces, the home country found itself faced with floods and starvation.
It is difficult for the government to 11 the villagers to see this.They are usually too lazy or too careless to plant and look after new trees. 12 the government has a good system of control, the forest will slowly 13 .This does not only mean that the villagers' sons and grandsons will have fewer trees.The results are even more 14 .Where there are trees, their roots break the soil up-allowing rain to sink in.The roots also bind the soil, 15 preventing it from being washed away easily.If there are no trees, rain falls on hard ground and flows away from the surface, carrying away with it, the rich top-soil.When all the top-soil is gone, nothing 16 but a worthless desert.
1.________ 2.________ 3.________ 4.________ 5.________
6.________ 7.________ 8.________ 9.________ 10.________
11.________ 12.________ 13.________ 14.________ 15.________
16.________
解析:
1.provide/supply 2.shade 3.prevent/stop 4.Unfortunately/Unluckily 5.third 6.large 7.lost 8.powerful 9.however 10.soil 11.persuade 12.Though 13.disappear 14.serious 15.thus 16.left
![](http://thumb2018.1010pic.com/images/loading.gif)