Africas When many people hear the word “Africa”, inevitably they picture steaming jungles and gorillas and other wild animals. Hollywood films have shrunk the public image of this immense, varied continent into a small segment of its actual diversity. To have a more accurate picture of the whole continent, however, one should remember that the continent can be roughly divided into three Africas: the northern desert areas, the southeastern grasslands, and the tropical jungles to the southwest, each with its distinct climate and terrain and with a style of life suited to the environment.
The northern regions have the environment and living patterns of the desert. Egypt, Libya, Algeria, and Morocco have hot, dry climates with very little land suited to farming. Green fields cannot be easily seen. Therefore, the population tends to be clustered into cities along rivers or the seacoast or into smaller settlements near oases. For thousands of years, people have lived in this vast region, relying partly on what the land could offer such as crops and animals they could raise and partly on trade with Europe.
The southeastern grasslands provide a better environment for animal life and for some kinds of crops. Many wild animals inhabit the plains in this region—elephants, giraffes, rhinoceros, antelopes, zebras, and lions. The people in this area have long been expert cattle raisers and experienced hunters. Tea, coffee, cotton, cashew nuts, and tobacco are some of the main products grown in this region. Fishing also provides some food and income for people along the coast. The population here is less concentrated in cities and towns than in the north, but tends to be denser in areas where adequate rainfall and fertile soil make farming possible.
West Africa is the region closest to the Hollywood image of mysterious jungles. As in the other two regions, the way people make a living depends upon their environment. This does not mean that most of the people live in grass huts in the jungle. In fact, such nations as Nigeria have become highly modernized by income from oil, timber, and minerals. Most of the western countries have some farming that provides food and income; sugar cane, coffee, and tobacco are the important cash crops, while bananas, rich, and corn are raised for food. Fishing in the rivers and along the coast also accounts for food and income, and precious stones, especially diamonds, enhance the economy of countries like Angola and the Ivory Coast.
Even a superficial look at the major regions of Africa shows that it is a continent with varied environments. Although most of the continent is tropical in its range of temperature, the climate ranges from deserts to rain forests. Similarly, human lifestyles vary from the simplest rural villages to industrial cities, both new and ancient. Contrary to the myth, however, jungle life makes up only a very small portion of the whole of Africa.
【正确答案】：
Ⅰ. INTRODUCTION: THREE AFRICAS WITH DIFFERENT CLIMATES, TERRAINS AND STYLES OF LIFE SUITED TO THE ENVIRONMENT
      A. INACCURATE PUBLIC IMPRESSION OF AFRICA
      B. THESIS: ONE SHOULD REMEMBER THAT THE CONTINENT CAN BE DIVIDED INTO THREE DIFFERENT AFRICAS.
Ⅱ. NORTHERN DESSERT REGIONS
      A. A PLACE OF HOT CLIMATE AND LITTLE LAND FOR FARMING
      B. POPULATION CLUSTERED INTO CITIES NEAR WATER
      C. PEOPLE LIVING ON FARMING AND TRADING WITH EUROPE
Ⅲ. SOUTHEASTERN GRASSLANDS
      A. A BETTER ENVIRONMENT FOR ANIMAL LIFE AND SOME CROPS
      B. PEOPLE LIVING ON CATTLE RAISING, HUNTING, CROPS GROWING, AND FISHING
      C. DENSER POPULATION IN AREAS WITH ADEQUATE RAINFALL
Ⅳ. WESTERN JUNGLE AREAS
      A. A REGION CLOSE TO HOLLYWOOD MOVIE IMAGE
      B. SOME HIGHLY MODERNIZED COUNTRIES
      C. PEOPLE LIVING ON FARMING AND FISHING
Ⅴ. CONCLUSION: A CONTINENT WITH VARIED ENVIRONMENTS
      A. CLIMATE RANGING FROM DESERTS TO RAIN FORESTS
      B. LIFESTYLES VARYING FROM RURAL VILLAGES TO INDUSTRIAL CITIES
      C. JUNGLE LIFE MAKING UP ONLY A SMALL PORTION
                        
【题目解析】：本文为一篇描写非洲的文章，介绍了非洲的三个不同地区的环境气候以及生活方式。第一段中出现了转折词However，后面的句子也是本段最后一句话是本文的主旨句：非洲可以划分为三个部分。Ⅰ. Introduction: three Africas with different climates, terrains and styles of life suited to the environment A. Inaccurate public impression of Africa B. Thesis: One should remember that the continent can be divided into three different Africas.第二段描写了非洲北部沙漠地区的生活环境和模式。Ⅱ. Northern dessert regions A. A place of hot climate and little land for farming B. Population clustered into cities near water C. People living on farming and trading with Europe第三段描写了东南部草原地区的环境、动植物、人类生活以及人口密度。Ⅲ. Southeastern grasslands A. A better environment for animal life and some crops B. People living on cattle raising, hunting, crops growing, and fishing C. Denser population in areas with adequate rainfall第四段描写了西部雨林地区的形象，那里的国家以及人们的谋生方式。Ⅳ. Western jungle areas A. A region close to Hollywood movie image B. Some highly modernized countries C. People living on farming and fishing最后一段为本文的总结，非洲大陆环境多样，气候以及人们的生活方式都是多样的，丛林生活只占整个非洲的很小一部分。Ⅴ. Conclusion: a continent with varied environments A. Climate ranging from deserts to rain forests B. Lifestyles varying from rural villages to industrial cities C. Jungle life making up only a small portion