Read the following article and select the best answer. Article: Your body works 24 hours a day. It's always building and repairing, feeding and cleansing itself. Its goal is to be ready for your every movement, breath, and thought. The quality of your life depends on how well your body works. And how well your body works depends on how much energy it gets. Energy comes from the food you eat. Food contains nutrients that your body needs for growth and energy. By eating a balanced diet, your body gets the six important nutrients it needs.Minerals are nutrients that build bones and teeth. Minerals also form red blood cells and other substances.Wateraids digestion and waste removal.Carbohydrates give your body its main source of energy. Two carbohydrates are sugars from foods such as fruits and vegetables and starches found in rice, potatoes, and bread.Fatshelp build cell membranes .Proteinsrepair and grow body tissues . Finally,vitaminshelp your body use carbohydrates, fats, and proteins. The United States Department of Agriculture(USDA) has created a nutritional food pyramid . It shows the daily number of servings you should eat from five food groups. The food pyramid has four levels. The base of the pyramid is the largest level. It contains the bread, cereal, rice, and pasta group from which you need six to eleven servings. The next level has two food groups: vegetables and fruits. The USDA recommends three to five servings of vegetables and two to four servings of fruit. The third level also has two groups: the milk, yogurt, and cheese group and the meat, poultry, fish, dry beans, eggs, and nuts group. You need two to three servings from each of these groups. The top of the pyramid is the smallest level. It contains fats, oils, and sweets. These foods have few nutrients, so eat them sparingly . Question: To help the reader understand the six nutrients needed by the body, the author _ . - describes the five basic food groups. - explains what a balanced diet is. - writes the details of each nutrient. - tells the number of daily servings needed from each food group.
writes the details of each nutrient.

(Question)
Read the following article and select the best answer. Article: Is there a limit to the number of years that a person can expect to live? Can changes in life-style add years to one's life? Throughout history people have sought answers to these questions and others. Various myths offer the hope of great longevity. In the imaginary land of Shangri-La, for example, people are said to lead a charmed existence for a thousand years. The Spanish explorer Ponce de Leon was convinced that he would find the Foundation of Youth in what is now the state of Florida. According to the Bible, Methuselah lived to be more than 900 years old. The subject of longevity is fascinating, and scientists study individuals such as Jeanne Calment to learn about the aging process. Calment died in 1997 in Arles, France, at the age of 122. She never married, and she lived in her own apartment until moving to a retirement community when she was 109. Most scientists agree that bodies will last, at best, about 125 years. This potential has changed little since modern human beings appeared more than 100 thousand years age. Recent improvements in medicine and the environment have extended life expectancy, especially for those from poorer parts of the world. It is not clear, however, whether such improvements will lengthen life expectancy beyond a certain point. Life expectancy is the number of years an infant can be expected to live, given the conditions into which it is born. Life expectancy, therefore, is affected by nutrition, medical care, and social and political circumstances. An individual's genetic makeup is also an important factor. Children from long-lived families can hope to enjoy long lives themselves. According to recent data, the average life expectancy worldwide in 1998 was 67 years. This can be compared with an average life expectancy of 77 in the United States. In 1970 the average life expectancy worldwide was 61 years, or 6 years less than it was in 1998. This same period saw a drop in infant mortality --- the death of a child before the first birthday---from 80 births out of 1,000 to 54... Question: One can conclude that _ . - the aging process can be stopped. - the aging process is inevitable. - life expectancy in the United States will soon reach 125 years. - the average life expectancy worldwide is decreasing
(Answer)
the aging process is inevitable.

Ques: Read the following article and select the best answer. Article: Now let's look ourselves as a species in relation to ecosystem balance.Modern scientists believe that humankind, like other animals, evolved through millions of years of changes and adaptations to the environment and that our most direct evolutionary ancestor was probably an earlier species of the primate(monkey, ape) group. Despite this similarity with other creatures, however, the evolution of humankind differs from that of other species in one important and unique way. In other species, evolution has led to specialization, both in the species abilities and in its place within the environmental structure. For example, the giraffe is much adapted to feeding on treetops, but it is also specialized and thus limited to feeding on trees and shrubs. Only with great difficulty can it bend down to graze on the ground. Similarly, the anteater is extremely well adapted to eating ants but is unable to catch or eat other animals. The same is true for countless other species. For humankind it is opposite. Our evolution had led to a very generalized ability. Our highly developed intelligence and ability to make and handle tools mean that we can do almost anything. Humans evolved in such a way that we are able to move into every environment on Earth and even into space. No natural competitor offers great resistance, and other natural enemies such as disease have been controlled. Said another way, we see in humankind a great imbalance between biological potential and environmental resistance. The result is the rapidly increasing world population, frequently referred to as the population explosion. Further, to support our growing population, natural ecosystems are being increasingly displaced by human habitations, agriculture, and other human supporting activities. Question: From the passage we can infer that in the course of evolution _ . - humankind is very important to earlier species, such as the primate group - human beings are limited by the environment while animals are not - human beings become more and more different from each other - humankind has experienced a generalization rather than specialization in ability
Ans:
humankind has experienced a generalization rather than specialization in ability