B)      用于标题对应题型中，例：

List of headings

I.         Rivers and seas cause damage

II.      Water, the provider of food

III.   The scarcity of water

IV.   What is water?

V.      How to solve flooding

VI.   Humans’ relationship with water

And the future? If we are to believe the forecasts, it is predicted that two thirds of the world population will be without fresh water by 2025. But for a growing number of regions of the world the future if already with us. While some areas are devastated by flooding, scarcity of water in many other places is causing conflict. The state of Texas in the United States of America is suffering a shortage of water with the Rio Grande falling to reach the Gulf of Mexico for the first time in 50 years in the spring of 2000, pitting region against region as they vie for water sources. With many parts of the globe running dry through drought and increased water consumption, there is now talk of water being the new oil.

分析：此段开头先提出了“根据预测到2025年世界上将有三分之二的人口喝不到淡水”接着分别用转折词but，while进一步提出某些地区由于洪水泛滥带来的破坏，在其它许多地方水的缺失已变得日趋严峻。接着从“The state of Texas…water sources”通过一个细节举例 (德克萨斯州的人们正在饱受缺水之苦)来作进一步说明。

C)用于摘要题型中，例：

How does the concept of homeopathy differ from that of conventional medicine? Very simply, homeopathy attempts to stimulate the body to recover itself. Instead of looking upon the symptoms as something wrong which must be set right, the homeopath sees them as signs of the way the body is attempting to help itself. Another basic difference between conventional medical therapy and homeopathy is in the role of medication. In much of conventional therapy the illness is controlled through regular use of medical substances. If the medication is withdrawn, the person returns to illness。

Summary

Homeopathy differs from conventional medicine in a number of ways. Conventional medicine views symptoms as an indication of something wrong in the body, whereas homeopathy sees them as signs that the body is attempting to heal itself. The uses of medication differ also. Many types of conventional medication control symptoms. but if the medicine is taken away, the illness returns……

List of words / phrases

C  cure.  getting better.  heal itself.  Illness.  control symptoms.  healthy

分析：通过题干中的转折词whereas可以在文中迅速定位到考点句型very simply…instead of…。题2中由重要信号词but if 可定位原文中if 引导的条件状语从句，同时原文中is withdrawn对应题目中的is taken away。