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thuyduong256
2 năm trước
Three swimmers, Paul, Ed , and Jim, ______________ now in competition for medals.
A.is  
B.has been                              
C.had been                   
D.are
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Read the passage carefully, then choose the correct answers.
A literate population is a necessity for any nation wishing to take advantage of modern technological growth. For instance, research has shown a direct relationship between literacy among women and improved health' and child care in the family. The United Nations Educational, Scientific, and Cultural Organization (UNESCO) has long supported the concept that education must be considered an ongoing process.
Adult education has long been important in Europe, where formal programs began in the 18th century. In Britain, concern for the education of poor and working-class people resulted in the growth of adult education programs, such as the evening school and the, Mechanic's Institute, to expand education opportunities for all people: After the Russian Revolution, the Russian government virtually eliminated illiteracy through the establishment of various institutions and extension classes for adults.
In other areas of the world, adult education movements are of a more recent origin. In 1960, Egypt established a 'schools for the people' system designed to educate the adult population. In the 1970s, countries in Africa, Asia, and Latin America began to increase opportunities for adult education. Innovative programs involving the mass media are being used in many countries. Tanzania, for example, has used mass education techniques and the radio to organize national education programs in health, nutrition, and citizenship. In the 1980s, international educational exchange programs grew in popularity in the United States and many other countries.
According to the passage, adult education ________.
A.offers opportunities for promotion   
B. is to educate people to improve their health
C.is popular all over the world nowadays  
D.has been developed thanks to the mass media

VI. Read the following passage and choose the best answers to the questions below.
After the Revolutionary War people in America were able to get news of European fashions. Fashion plates (=pictures) and dolls showing the latest fashions were sent to the US, and American women began wearing large hoop skirts. Some people thought that heavy hoops and corsets were bad for the health, and encouraged women to wear looser clothes. Amelia Bloomer designed light frilled trousers, called bloomers, but many people laughed at them. Though bloomers were not popular, there was a fashion for smaller, lighter skirts. American men also followed fashion and began wearing long trousers (or pants) instead of breeches.
In the context of the passage, the word "encouraged" mean ___
A.suggested that someone did something                  
B.helped someone do something
C.gave someone hope                                                
D.helped so that someone continue doing something

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 26 to 32.
An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelt - a far cry from the extensive list of harmful substances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapour might be considered an air pollutant under certain conditions.
Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and nitrogen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature's output of these compounds dwarfs that resulting from human activities. However, human production usually occurs in a localized area, such as a city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air.
The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a substance to be a pollutant; in fact, the numerical value tells us little until we know how much of an increase this represents over the concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.
According to the passage, human-generated air pollution in localized regions……
A.will damage areas outside of the localized regions
B.can overwhelm the natural system that removes pollutants
C.will react harmfully with natural pollutants
D.can be dwarfed by nature's output of pollutants

Choose the word or phrase (A, B, C, or D) that best fits each space in the following passage.
         WHY DO ANIMALS GO EXTINCT?
         Different kinds of animals have appeared and disappeared throughout Earth's history. Some animals go extinct because the climate (31)                 they live changes. The climate may become wetter or drier. It may become warmer or cooler. If the animals cannot change, or adapt, to the new climate, they die.
         Some animals go extinct bacause they cannot (32)              with other animals for food. Some animals go extinct because they are killed by enemies. New kinds of animals are always evolving. Evolving means that the animals are changing (33)               from generation to generation. Small differences between parents, children, and grandchildren slowly add up over many, many generations. Eventually, a new kind of animal evolves.
         Sometimes many of the animals on Earth go extinct at the (34)                 time. Scientists call this a mass extiction. Scientists think there (35)                  at least five mass extinctions in Earth's history. The last mass extinction happened about 65 million years ago. This mass extinction killed off the dinosaurs.
(35) 
A.have been  
B.will be   
C.are                          
D.has been

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