阅读理解Sincetheearliesttimes,treeshavealwaysbeenveryuseful...

问题详情：

阅读理解

Since the earliest times , trees have always been very useful and important to man who made use of them in many ways . Even today trees continue to serve man in so many ways .

Trees provide man with fruits and building in the form of wood . Without trees it would be impossible to build houses , boats and even bridges . Furniture（家具）such as tables , chairs and beds are made of wood .

In the tropics（热带地区）where it is very hot all through the year, trees protect man from the terrible heat . They are also used in preventing good and rich top soil from being washed away during heavy rains which are so common in the tropics .

In there were no trees or vegetation（植被）of some kinds to hold back the soil with their roots soil , heavy rains would wash the rich surface（表面）soil that is so important and necessary to agriculture（农业）. The result is that the land becomes a desert .

There are so many desert areas in the world . A long time ago these desert areas must have been very rich fertile（丰产的）areas , but since our ancestors（祖先）in the past hadn’t enough knowledge about science of nature , they cut down all the trees in the areas where they lived and never planted new ones . By and by , the rich surface soil was blown away and washed away by strong winds and heavy rains . In the end the land was turned into useless deserts where nothing could grow .

阅读短文，根据短文内容选择正确*。

1. According to the passage       .

A. ancient man did know how to make use of trees

B. trees are not as useful now as they used to be

C. trees were more useful in the past than they are now    

D. men have always found trees very useful

2. The phrase “ top soil ” means       .

A. useless soil which is of no use for agriculture

B. soil on the surface of the earth which is good for agriculture

C. soil found under the earth which is found under roots of trees

D. dry soil in desert areas which is bad for agriculture

3. According to the passage , some desert areas were once       .

A. lands with good soil                                     B. covered by ice and snow

C. very cold                                             D. very dry and useless

4. If there were no trees ,       .

A. the land would become more fertile                       B. heavy rains would clean the tropics

C. the rich top soil couldn’t be held back                   D. there would be no agriculture at all

5. Form the passage , we know that       .

A. man can do nothing to keep the balance of nature

B. man may take no notice of the balance of nature

C. man must do his best to keep the balance of nature

D. the balance of nature is unimportant to man

【回答】

1B 2C 3B 4A 5A

知识点：日常生活类

题型：阅读理解