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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 questions from 28 to 34.

        It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food Resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

        The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago. When approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

        One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

Which of the following is NOT mentioned in paragraph 1 as resulting from rapid ecological change?

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 28 to 34.

        It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food Resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

        The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago. When approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

        One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

What does the author say in paragraph 1 regarding most species in Earth’s history?

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 28 to 34.

        It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food Resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

        The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago. When approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

        One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

The word “it” in paragraph 1 refers to _________

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27. Fill in the appropriate word in question 27

        Easter is a holiday in late March or early April, the first Sunday after the first full moon after 21 March. Many people (23) _________it with their family or have a short holiday/ vacation. It is also an important Christian festival. Easter Sunday, the day of the Resurrection, is the end of Lent (24) _________ the most important date in the Christian year. Many people who do not go to church at other times go on Easter Sunday. It was once common for people to wear new clothes to church on this day. Women wore new hats, called Easter bonnets. Today, people sometimes make elaborately decorated Easter bonnets for fun. A few people send Easter cards with religious symbols on them or pictures of small chickens, lambs, rabbits and spring flowers, all traditionally associated (25)          _________ Easter.

        The Friday before Easter Sunday is called Good Friday and is (26) _________ as the day Christ was crucified (= hanged on a cross to die). On Good Friday many people eat hot cross buns (= fruit buns decorated with a simple cross). The Monday after Easter is called Easter Monday. In Britain Good Friday and Easter Monday are both bank holidays. In the US, each company decides for itself (27) _________to close or remain open on those days.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27. Fill in the appropriate word in question 26

        Easter is a holiday in late March or early April, the first Sunday after the first full moon after 21 March. Many people (23) _________it with their family or have a short holiday/ vacation. It is also an important Christian festival. Easter Sunday, the day of the Resurrection, is the end of Lent (24) _________ the most important date in the Christian year. Many people who do not go to church at other times go on Easter Sunday. It was once common for people to wear new clothes to church on this day. Women wore new hats, called Easter bonnets. Today, people sometimes make elaborately decorated Easter bonnets for fun. A few people send Easter cards with religious symbols on them or pictures of small chickens, lambs, rabbits and spring flowers, all traditionally associated (25)          _________ Easter.

        The Friday before Easter Sunday is called Good Friday and is (26) _________ as the day Christ was crucified (= hanged on a cross to die). On Good Friday many people eat hot cross buns (= fruit buns decorated with a simple cross). The Monday after Easter is called Easter Monday. In Britain Good Friday and Easter Monday are both bank holidays. In the US, each company decides for itself (27) _________to close or remain open on those days.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27. Fill in the appropriate word in question 25

        Easter is a holiday in late March or early April, the first Sunday after the first full moon after 21 March. Many people (23) _________it with their family or have a short holiday/ vacation. It is also an important Christian festival. Easter Sunday, the day of the Resurrection, is the end of Lent (24) _________ the most important date in the Christian year. Many people who do not go to church at other times go on Easter Sunday. It was once common for people to wear new clothes to church on this day. Women wore new hats, called Easter bonnets. Today, people sometimes make elaborately decorated Easter bonnets for fun. A few people send Easter cards with religious symbols on them or pictures of small chickens, lambs, rabbits and spring flowers, all traditionally associated (25)          _________ Easter.

        The Friday before Easter Sunday is called Good Friday and is (26) _________ as the day Christ was crucified (= hanged on a cross to die). On Good Friday many people eat hot cross buns (= fruit buns decorated with a simple cross). The Monday after Easter is called Easter Monday. In Britain Good Friday and Easter Monday are both bank holidays. In the US, each company decides for itself (27) _________to close or remain open on those days.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27. Fill in the appropriate word in question 24

        Easter is a holiday in late March or early April, the first Sunday after the first full moon after 21 March. Many people (23) _________it with their family or have a short holiday/ vacation. It is also an important Christian festival. Easter Sunday, the day of the Resurrection, is the end of Lent (24) _________ the most important date in the Christian year. Many people who do not go to church at other times go on Easter Sunday. It was once common for people to wear new clothes to church on this day. Women wore new hats, called Easter bonnets. Today, people sometimes make elaborately decorated Easter bonnets for fun. A few people send Easter cards with religious symbols on them or pictures of small chickens, lambs, rabbits and spring flowers, all traditionally associated (25)          _________ Easter.

        The Friday before Easter Sunday is called Good Friday and is (26) _________ as the day Christ was crucified (= hanged on a cross to die). On Good Friday many people eat hot cross buns (= fruit buns decorated with a simple cross). The Monday after Easter is called Easter Monday. In Britain Good Friday and Easter Monday are both bank holidays. In the US, each company decides for itself (27) _________to close or remain open on those days.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27. Fill in the appropriate word in question 23

        Easter is a holiday in late March or early April, the first Sunday after the first full moon after 21 March. Many people (23) _________it with their family or have a short holiday/ vacation. It is also an important Christian festival. Easter Sunday, the day of the Resurrection, is the end of Lent (24) _________ the most important date in the Christian year. Many people who do not go to church at other times go on Easter Sunday. It was once common for people to wear new clothes to church on this day. Women wore new hats, called Easter bonnets. Today, people sometimes make elaborately decorated Easter bonnets for fun. A few people send Easter cards with religious symbols on them or pictures of small chickens, lambs, rabbits and spring flowers, all traditionally associated (25)          _________ Easter.

        The Friday before Easter Sunday is called Good Friday and is (26) _________ as the day Christ was crucified (= hanged on a cross to die). On Good Friday many people eat hot cross buns (= fruit buns decorated with a simple cross). The Monday after Easter is called Easter Monday. In Britain Good Friday and Easter Monday are both bank holidays. In the US, each company decides for itself (27) _________to close or remain open on those days.

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 35 to 42.

        Glass is a remarkable substance made from the simplest raw materials. It can be colored or colorless, monochrome or polychrome, transparent, translucent, or opaque. It is lightweight impermeable to liquids, readily cleaned and reused, durable yet fragile, and often very beautiful Glass can be decorated in multiple ways and its optical properties are exceptional. In all its myriad forms - as table ware, containers, in architecture and design - glass represents a major achievement in the history of technological developments.

        Since the Bronze Age about 3,000 B.C., glass has been used for making various kinds of objects. It was first made from a mixture of silica, line and an alkali such as soda or potash, and these remained the basic ingredients of glass until the development of lead glass in the seventeenth century. When heated, the mixture becomes soft and malleable and can be formed by various techniques into a vast array of shapes and sizes. The homogeneous mass thus formed by melting then cools to create glass, but in contrast to most materials formed in this way (metals, for instance), glass lacks the crystalline structure normally associated with solids, and instead retains the random molecular structure of a liquid. In effect, as molten glass cools, it progressively stiffens until rigid, but does so without setting up a network of interlocking crystals customarily associated with that process. This is why glass shatters so easily when dealt a blow. Why glass deteriorates over time, especially when exposed to moisture, and why glassware must be slowly reheated and uniformly cooled after manufacture to release internal stresses induced by uneven cooling.

        Another unusual feature of glass is the manner in which its viscosity changes as it turns from a cold substance into a hot, ductile liquid. Unlike metals that flow or “freeze” at specific temperatures glass progressively softens as the temperature rises, going through varying stages of malleability until it flows like a thick syrup. Each stage of malleability allows the glass to be manipulated into various forms, by different techniques, and if suddenly cooled the object retains the shape achieved at that point. Glass is thus amenable to a greater number of heat-forming techniques than most other materials.

According to the passage, why can glass be more easily shaped into specific forms than can metals

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 35 to 42.

        Glass is a remarkable substance made from the simplest raw materials. It can be colored or colorless, monochrome or polychrome, transparent, translucent, or opaque. It is lightweight impermeable to liquids, readily cleaned and reused, durable yet fragile, and often very beautiful Glass can be decorated in multiple ways and its optical properties are exceptional. In all its myriad forms - as table ware, containers, in architecture and design - glass represents a major achievement in the history of technological developments.

        Since the Bronze Age about 3,000 B.C., glass has been used for making various kinds of objects. It was first made from a mixture of silica, line and an alkali such as soda or potash, and these remained the basic ingredients of glass until the development of lead glass in the seventeenth century. When heated, the mixture becomes soft and malleable and can be formed by various techniques into a vast array of shapes and sizes. The homogeneous mass thus formed by melting then cools to create glass, but in contrast to most materials formed in this way (metals, for instance), glass lacks the crystalline structure normally associated with solids, and instead retains the random molecular structure of a liquid. In effect, as molten glass cools, it progressively stiffens until rigid, but does so without setting up a network of interlocking crystals customarily associated with that process. This is why glass shatters so easily when dealt a blow. Why glass deteriorates over time, especially when exposed to moisture, and why glassware must be slowly reheated and uniformly cooled after manufacture to release internal stresses induced by uneven cooling.

        Another unusual feature of glass is the manner in which its viscosity changes as it turns from a cold substance into a hot, ductile liquid. Unlike metals that flow or “freeze” at specific temperatures glass progressively softens as the temperature rises, going through varying stages of malleability until it flows like a thick syrup. Each stage of malleability allows the glass to be manipulated into various forms, by different techniques, and if suddenly cooled the object retains the shape achieved at that point. Glass is thus amenable to a greater number of heat-forming techniques than most other materials.

The word “it” in paragraph 3 refers to _________.

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 35 to 42.

        Glass is a remarkable substance made from the simplest raw materials. It can be colored or colorless, monochrome or polychrome, transparent, translucent, or opaque. It is lightweight impermeable to liquids, readily cleaned and reused, durable yet fragile, and often very beautiful Glass can be decorated in multiple ways and its optical properties are exceptional. In all its myriad forms - as table ware, containers, in architecture and design - glass represents a major achievement in the history of technological developments.

        Since the Bronze Age about 3,000 B.C., glass has been used for making various kinds of objects. It was first made from a mixture of silica, line and an alkali such as soda or potash, and these remained the basic ingredients of glass until the development of lead glass in the seventeenth century. When heated, the mixture becomes soft and malleable and can be formed by various techniques into a vast array of shapes and sizes. The homogeneous mass thus formed by melting then cools to create glass, but in contrast to most materials formed in this way (metals, for instance), glass lacks the crystalline structure normally associated with solids, and instead retains the random molecular structure of a liquid. In effect, as molten glass cools, it progressively stiffens until rigid, but does so without setting up a network of interlocking crystals customarily associated with that process. This is why glass shatters so easily when dealt a blow. Why glass deteriorates over time, especially when exposed to moisture, and why glassware must be slowly reheated and uniformly cooled after manufacture to release internal stresses induced by uneven cooling.

        Another unusual feature of glass is the manner in which its viscosity changes as it turns from a cold substance into a hot, ductile liquid. Unlike metals that flow or “freeze” at specific temperatures glass progressively softens as the temperature rises, going through varying stages of malleability until it flows like a thick syrup. Each stage of malleability allows the glass to be manipulated into various forms, by different techniques, and if suddenly cooled the object retains the shape achieved at that point. Glass is thus amenable to a greater number of heat-forming techniques than most other materials.

What must be done to release the internal stresses that build up in glass products during manufacture?