Question

14．Trees are useful to man in three important ways：they give him wood and other useful things，they give him cool places，and they help to stop drought and flood．
  Unluckily，in many parts of the world，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 bind 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．
21．The most important points of trees to man isB．
A．they help him to make money
B．they help him to stop drought and floods
C．they give him wood and other things
D．they give him cool
22．In many places forests slowly disappear becauseC．
A．many trees have been cut down by man
B．new trees are not well looked after
C．a(chǎn)ll the above
D．man has not paid enough attention to planting trees
23．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．there are no longer trees to keep the rain and protect the top-soil．
24．Which title best fits the passage？D
A．Trees and Man
B．The Function of Tree Wood
C．How do People do with Trees？
D．The Usage of Tree Root s．

Answer 1

分析 本文反映了樹木給人類帶來的益處和亂砍亂伐樹木所帶來的危害，旨在告誡人們不要亂砍亂伐．

解答 21．B．細節(jié)題：從第一段的句子：They provide him with wood and other products； they provide him shade；．a(chǎn)nd they help to prevent droughts（早災）and floods．樹木可以提供木材和其他產(chǎn)品，防旱防澇，可知答案是B．
22．C．細節(jié)題：文章第二段段意可知關于森林的消失提到ABD的內(nèi)容都是原因，故選C．
23．D．細節(jié)題：從第三段的內(nèi)容：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 the top-soil is gone，nothing remains but worthless desert．可知沒有大樹，表層泥土就會流失，導致沙漠的形成．選D．
24．D．主旨題：從第一段的主題句：Trees are useful to man in three important ways：可知是講-樹和人類的關系．選D．

點評 本篇文章都是細節(jié)推理題，答題的已給選項也一般不會和短文相關詞語完全相同，需要考生自己理解句子，延伸推理出題目答案，比一般細節(jié)理解題偏難．