五、阅读理解（共20分）
本部分有两篇短文，每篇短文后有五个问题，每个问题有四个供选择的答案。
请选择一个最佳答案。
Passage 1
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 materials in the form of wood. Without trees if would be impossible to build houses, boats and even bridges. Furniture such as tables, chairs and beds is made of wood.
In the tropics (热带地区) where it is very hot throughout the year, trees protect man from the terrible heat. They are also useful in preventing good and rich top soil from being washed away during heavy rains which are so common in the tropics.
If there were no trees or vegetation (植被) of some kind to hold back the soil with their roots, heavy rain would wash away the rich surface soil that is so important and necessary to agriculture. 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 fertile (肥沃的) areas, but since our ancestors (祖先) in the distant past did not have 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 and washed away by strong winds and heavy rains. In the end the lands were turned into useless deserts where nothing could grow.
71.＂Rich top Soil＂ in Line 2, Paragraph 2 means________ and is ________.
A. useless soil … of no use for agriculture
B. soil on the surface of the earth … good for agriculture
C. soil found under the earth … found under the roots of trees
D. dry soil in desert areas … bad for agriculture
72. According to the passage, some desert areas were once________.
A. fertile lands B. very wet
C. very cold D. very dry and useless lands
73.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. the balance of nature is unimportant to man
74.From this 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. man must have knowledge of science of nature
75. The best title of this passage is________.
A. The Uses and Importance of Trees
B. The Importance of Top Soil
C. How Are Rich Lands Turned into Deserts
D. Keep the Balance of Nature本新闻共 6页,当前在第 5页 1 2 3 4 5 6 |
