Choose the one word or phrase that best completes the sentences or substitutes for the underlined part.
A number of students ______ in intensive language programs abroad nowadays.
A.participated 
B.has participated
C.have participated  
D.is participating

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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 following questions
One of the most important social developments that helped to make possible a shift in thinking about the role of public education was the effect of the baby boom of the 1950's and 1960's on the schools. In the 1920's, but especially in the Depression conditions of the 1930's, the United States experienced a declining birth rate – every thousand women aged fifteen to forty-four gave birth to about 118 live children in 1920, 89.2 in 1930, 75.8 in 1936, and 80 in 1940. With the growing prosperity brought on by the Second WorldWar and the economic boom that followed it, young people married and established households earlier and began to raise larger families than had their predecessors during the Depression. Birth rates rose to 102 per thousand in 1946, 106.2 in 1950, and 118 in 1955. Although economics was probably the most important determinant, it is not the only explanation for the baby boom. The increased value placed on the idea of the family also helps to explain this rise in birth rates. The baby boomers began streaming into the first grade by the mid-1940's and became a flood by 1950. The public school system suddenly found itself “overtaxed”. While the number of schoolchildren rose because of wartime and postwar conditions, these same conditions made the schools even less prepared to cope with the flood. The wartime economy meant that few new schools were built between 1940 and 1945. Moreover, during the war and in the boom times that followed large numbers of teachers left their profession for better-paying jobs elsewhere in the economy.
Therefore, in the 1950's and 1960's, the baby boom hit an antiquated and inadequate school system. Consequently, the "custodial rhetoric" of the 1930's and early 1940's no longer made sense; that is, keeping youths aged sixteen and older out of the labor market by keeping them in school could no longer be a high priority for an institution unable to find space and staff to teach younger children aged five to sixteen. With the baby boom, the focus of educators and of laymen interested in education inevitably turned toward the lower grades and back to basic academic skills and discipline. The system no longer had much interest in offering nontraditional, new, and extra services to older youths.
The public school of the 1950s and 1960s faced all of the following problems EXCEPT
A.an inadequate number of school buildings
B.old-fashioned facilities
C.a shortage of teachers      
D.a declining number of students

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 following questions
One of the most important social developments that helped to make possible a shift in thinking about the role of public education was the effect of the baby boom of the 1950's and 1960's on the schools. In the 1920's, but especially in the Depression conditions of the 1930's, the United States experienced a declining birth rate – every thousand women aged fifteen to forty-four gave birth to about 118 live children in 1920, 89.2 in 1930, 75.8 in 1936, and 80 in 1940. With the growing prosperity brought on by the Second WorldWar and the economic boom that followed it, young people married and established households earlier and began to raise larger families than had their predecessors during the Depression. Birth rates rose to 102 per thousand in 1946, 106.2 in 1950, and 118 in 1955. Although economics was probably the most important determinant, it is not the only explanation for the baby boom. The increased value placed on the idea of the family also helps to explain this rise in birth rates. The baby boomers began streaming into the first grade by the mid-1940's and became a flood by 1950. The public school system suddenly found itself “overtaxed”. While the number of schoolchildren rose because of wartime and postwar conditions, these same conditions made the schools even less prepared to cope with the flood. The wartime economy meant that few new schools were built between 1940 and 1945. Moreover, during the war and in the boom times that followed large numbers of teachers left their profession for better-paying jobs elsewhere in the economy.
Therefore, in the 1950's and 1960's, the baby boom hit an antiquated and inadequate school system. Consequently, the "custodial rhetoric" of the 1930's and early 1940's no longer made sense; that is, keeping youths aged sixteen and older out of the labor market by keeping them in school could no longer be a high priority for an institution unable to find space and staff to teach younger children aged five to sixteen. With the baby boom, the focus of educators and of laymen interested in education inevitably turned toward the lower grades and back to basic academic skills and discipline. The system no longer had much interest in offering nontraditional, new, and extra services to older youths.
Which of the following best characterizes the organization of the passage?
A.The second paragraph provides a fictional account to illustrate a problem presented in the firstparagraph.
B.The second paragraph argues against a point made in the first paragraph.
C.The second paragraph introduces a problem not mentioned in the first paragraph
D.The second paragraph presents the effect of circumstances described in the first paragraph.

Read the passage carefully, then choose the correct answer.
  The hobby of collecting consists of acquiring specific items based on a particular interest of the collector. These collections of things are often highly organized, carefully cataloged, and attractively displayed. Since collecting depends on the interests of the individual collector, it may deal with almost any subject. The depth and breadth of the collection may also vary. Some collectors choose to focus on a specific subtopic within their area of general interest: for example, 19th Century postage stamp, milk bottle labels from Sussex, or Mongolian harnesses and tack. Others prefer to keep a more general collection, accumulating Star Trek merchandise, or stamps from all countries of the world. Some collections are capable of being completed, at least to the extent of owning one sample of each possible item in the collection (e.g. a copy of every book by Agatha Christie). Collectors who specifically try to assemble complete collections in this way are sometimes called 'completist'. Upon completing a particular collection, they may stop collecting, expand the collection to include related items, or begin an entirely new collection. The most popular fields in collecting have specialized commercial dealers that trade in the items being collected, as well as related accessories. Many of these dealers started as collectors themselves, then turned their hobby into a profession. There are some limitations on collecting, however. Someone who has the financial means to collect stamps might not be able to collect sport cars, for example. 
Collecting may deal with almost any subject because ......
 
A. it has a wide range of subjects
B.it depends on the collector's interests
C.it is often classified into different categories
D.it is based on a particular interest of the collector.