【人教版】2014届英语一轮复习限时训练：必修5 综合能力检测（含答案详解）_高考复习指南

【人教版】2014届英语一轮复习限时训练：必修5 综合能力检测（含答案详解）

　　The word “conservation” has a thrifty (节俭) meaning.To conserve is to save and protect, to leave what we ourselves enjoy in such good condition so that others may also share the enjoyment.Our forefathers had no idea that human population would increase faster than the supplies of raw materials; most of them, even until very recently, had this foolish idea that the treasures were “limitless” and “inexhaustible”．Most of the citizens or earlier generations knew little or nothing about the complicated and delicate system that runs all through nature, and which means that, as in a living body, an unhealthy condition of one part will sooner or later be harmful to all the others.

　　Fifty years ago nature study was not part of the school work; scientific forestry (林地) was a new idea: timber (木材) was still cheap because it could be brought in any quantity from distant woodlands; soil destruction and river floods were not national problems; nobody had yet studied longterm climatic cycles in relation to proper land use; even the word “conservation” had nothing of the meaning that it has for us today.

　　For the sake of ourselves and those who will come after us, we must now set about repairing the mistakes of our forefathers.Conservation should, therefore, be made a part of everyone's daily life.To know about the water table (地下水位) in the ground is just as important to us as a knowledge of the basic mathematic formulas.We need to know why all watersheds need the protection of plant life and why the running current of streams and river must be made to yield their full benefit to the soil before they finally escape to the sea.We need to be taught the duty of planting trees as well as of cutting them.We need to know the importance of big, mature trees, because living_space_for_most_of_man's_fellow_creatures_on_this_planet_is_figured_not_only_in_square_measure_of_surface_but_also_in_cubic_volume_above_the_earth.In brief, it should be our goal to restore as much of the original beauty of nature as we can.