Trees are useful to man in important ways: they provide him with wood and other products；they provide him shade；and they help to prevent droughts（旱灾）and floods.
Unfortunately，in many parts of the world，man has not realized that the third of these services is the most important. In his eagerness to make money from trees，（1）______________，only to find that without them he has lost the best friends he had.
This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees，their roots break up soil allowing the rain to sink in and also bind（固定）the soil，thus preventing 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 the top-soil is gone，nothing remains but worthless desert.
Two thousand years ago，a rich and powerful country cut down its trees to build warships，with which to gain itself and empire. It set up the empire，but without its trees，（2）_______________. When the empire fell to pieces，the home country found itself faced by floods and starvation（饥荒）.
Even though a government realizes the importance of a plentiful supply of trees，it is difficult for it to persuade（说服）the villager to see this. The villager wants wood to cook his food，and he can earn money by making charcoal or selling wood to the townsman. He is usually too lazy or too careless to plant and look after trees. So unless the government has a good system of control，or can educate the people，the forests will slowly disappear.
【小题1】选择最佳句子补全文章，其中有一项是多余的。（1）| A．and trees even can protect the water resource |
| B．its soil became poor and grew weak |
| C．he has cut them down in large numbers |
【小题3】从第五段中找出与“Man has not paid enough attention to planting trees. ”意思相同或相近的句子。
【小题4】回答问题。What should the government do to stop the forests from slowly disappearing？
【小题5】选择文章的最佳标题，将其字母代号写在横线上。__________
| A．How an empire fell |
| B．What causes drought and floods |
| C．Trees and man |
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