Trees are useful to man in three important ways: they give him wood and other useful thing

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.
【小题1】The most important points of trees to man is .A．they help him to make moneyB．they give him coolC．they give him wood and other thingsD．they help him to stop drought and floods【小题2】In many places forests slowly disappear because .A．many trees have been cut down by manB．new trees are not well looked afterC．man has not paid enough attention to planting treesD．all the above【小题3】Land becomes desert after all trees are cut down because .A．roots of trees break up the soilB．there are too many rainfallsC．strong winds bring a lot of sandD．there are no longer trees to keep the rain and protect the top-soil.【小题4】Which title best fits the passage?A．Trees and ManB．The Function of Tree WoodC．How do People do with Trees?D．The Usage of Tree RootsD

(答案→)D 解析：说明本文树和人的关系，人们毁坏了树，导致了很多的环境破坏行为。【小题1】D 细节题。根据第二段man has not found that the third of these points is the most important.说明这里的第三点就是第一段的they help to stop drought and flood.故D正确。【小题2】D 细节题。根据文章2,3,4行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.说明ABC三项都是原因。故D正确。【小题3】A 细节题。根据第三段2,3行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故A正确。【小题4】A 主旨大意题。说明本文树和人的关系，人们毁坏了树，导致了很多的环境破坏行为。故A正确。

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