根据短文内容.从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项.[1] They provide him wood and other products; they give him

【题目】根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余

选项。

【1】__ They provide him wood and other products; they give him shade; and they help to prevent drought and floods.

【2】___ In his eagerness to draw quick profit from the trees, he has cut them down in large numbers.

Two thousand years ago, a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It gained the empire but, without its trees, its soil became bare and poor. When the empire fell to pieces, the country found itself faced by floods and starvation.

Even where a government realizes the importance of a plentiful supply of trees, it is difficult sometimes to make the people realize this. 【3】 __ So unless the government has a good system of control, or can educate the people, the forests slowly disappear.

【4】__ The results are even more serious: for where there are trees, their roots break the soil up, allowing the rain to sink in, and also hold the soil. 【5】___ But where there are no trees, the rainfalls on hard ground and flows away on the surface, and this causes floods and the rain carries away the rich topsoil in which crops grow. When all the topsoil is gone, nothing remains but worthless desert．

A. Trees are useful to man in three very important ways.

B. This does not only mean that there will be fewer trees.

C. They cut down the trees but are too careless to plant and look after new trees.

D. If there were n more trees, something terrible would happen.

E. This prevent the soil from being washed away.

F. However, a lot of trees are being cut down.

G. Unfortunately, in many parts of the world, man has not realized the third of these services is the most important.

【答案】

【1】A

【2】G

【3】C

【4】B

【5】E

【解析】

试题分析：本文概括了树木对人类的三个好处，提供木材和其它产品，提供阴凉，帮助人类防止洪灾和旱灾，人们没有意识到树木在防止洪灾和旱灾的重要性，还可以防止水土流失。

【1】A 根据下文提到They provide him wood and other products; they give him shade; and they help to prevent drought and floods.他们能提供木材和其它产品，提供阴凉，帮助人类防止洪灾和旱灾，故选A树木的三个重要的用途。

【2】G 根据下文提到In his eagerness to draw quick profit from the trees, he has cut them down in large numbers.在吸收方面可以起到重要的作用，故选G项。

【3】C 根据上文提到Even where a government realizes the importance of a plentiful supply of trees, it is difficult sometimes to make the people realize this政府没有意思到树木的重要性，故选C他们砍树但对于种树和保护小树非常粗心。

【4】B 根据下文提到The results are even more serious: for where there are trees, their roots break the soil up, allowing the rain to sink in, and also hold the soil结果非常严重，树根不能保护土壤，故选B 这意味着不仅仅树越来越少。

【5】E根据上文提到But where there are no trees, the rainfalls on hard ground and flows away on the surface, and this causes floods and the rain carries away the rich topsoil in which crops grow.但没有树，雨水冲刷地面，导致洪水，冲走丰富的土壤，故选E这能阻止土壤被冲走。