閱讀并按要求做題。

　　Trees are useful to men in three important ways：　　1　　, they give them shade, and they help to prevent drought and floods(防止洪水與干旱)．

　　Unfortunately, in many parts of the world, men have not realized(意識)that the third of these is the most important．In their eagerness(渴望)to make money from trees, 　　2　　, only to find that without them they have lost the best friends they had．And also 　　3　　, so many trees are slowly gone．

　　This doesn’t not only mean that men will have fewer trees．The results(結(jié)果)are even more serious：　　4　　, their roots(樹跟)break up soil——having the rain go in——and also bind(固定)the soil(土壤), thus stopping it from being washed away easily; 　　5　　, the rain falls on hard ground and runs away, causing floods and carrying away the rich top-soil．

A．some people have cut trees down in large numbers

B．but where there are no trees

C．they provide(供給)them with wood

D．they are usually too careless to plant and look after new trees

E．for where there are trees

6．Which is the best title of the passage?________

A．Planting More Trees

B．The Problems of Trees

C．Never Cut Down Trees

D．The importance of Trees

答案：C;A;D;E;B;D
解析：

　　1．C項和they give them shade and…是并列的三個方面。

　　2．從…to make money from trees能推斷出A

　　3．不僅砍樹，而且還不注意愛護和植樹。

　　4．進一步說明more serious的原因。

　　5．B項和E項構(gòu)成對比。

　　6．D概括了文章的主旨大意。


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