Question

13．Trees are of great use to man in three important ways：they offer him wood and other useful things，they give him cool places，and they help to stop dr ought and flood．
In many parts of the world，unfortunatel y，man has not found that the third of these points is the most important．Man wants to make money from trees，so he has cut them down in large numbers，only to find that without them he has lost the best friends he had．And also，he is usually too careless to plant and look after new trees．So the forests slowly disappear．
This does not only mean that man will have fewer trees．The results are even worse：for where there are trees，their roots break up soil-make the rain in-and also b ind（粘合，凝結(jié)） the soil，thus stopping it from being washed away easily； but where there are no trees，the rain falls on hard ground and flows away，causing floods and carrying away the rich top-soil．When all the top-soil is gone，nothing is left but useless desert．
12．The most important points of trees to man isA．
A．they help him to stop drought and floods
B．they offer him cool places
C．they give him wood and other things
D．they help him to make money  
13．Which is not the reason for forests'slow disappearance in many places？
D
A．Many trees have been cut down by man．
B．New trees are not well looked after．
C．Less attention is paid to planting trees．
D．Global warming．
14．Land becomes desert after all trees are cut down becauseD．
A．roots of trees break up the soil   
B．there are too many rainfalls
C．strong winds bring a lot of sand
D．no more trees keep the rain and protect the top-soil．
15．Which title best fits the passage？B
A．Trees and Man                             
B．The Function of Tree Wood
C．How do People do with Trees？
D．The Usage of Tree Roots．

Answer 1

分析 本文敘述了樹木在人們的生活中起著很重要的作用，短文給出了三個方面的作用．一是樹可以給我們提供食物、木頭和其他的一些產(chǎn)品．二是樹木可以給我們提供樹蔭．三是樹可以防止旱災和水災．因此如果人們不保護樹木，最終就會發(fā)現(xiàn)他們失去了最好的朋友．

解答 12．A．細節(jié)理解題．根據(jù)第二段In many parts of the world，unfortunatel y，man has not found that the third of these points is the most important可知樹對人類最重要的一點是他們幫助他阻止干旱和洪水；故選A．
13．D．細節(jié)理解題．根據(jù)第二段so he has cut them down in large numbers，only to find that without them he has lost the best friends he had．And also，he is usually too careless to plant and look after new trees可知森林消失在許多地方的原因是大量地砍伐，新樹沒有得到很好的照顧以及不關(guān)注植樹；故選D．
14．D．細節(jié)理解題．根據(jù)最后一段for where there are trees，their roots break up soil-make the rain in-and also b ind（粘合，凝結(jié)） the soil，thus stopping it from being washed away easily可知土地變成了沙漠因為沒有樹木來保持降雨和保護土壤；故選D．
15．B．推理判斷題．根據(jù)第一段they offer him wood and other useful things，they give him cool places，and they help to stop dr ought and flood可知最佳標題為樹木的作用；故選B．

點評 考察學生的細節(jié)理解和推理判斷能力，做細節(jié)理解題時一定要找到文章中的原句，和題干進行比較，再做出正確的選擇．在做推理判斷題不要以個人的主觀想象代替文章的事實，要根據(jù)文章事實進行合乎邏輯的推理判斷．