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 .
     
      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 inEngland in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled - 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 vapor 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.
 
The word "These" in the second paragraph is closest in meaning to_.
A.the components in biogeochemical cycles           
B.the various chemical reactions
C. the pollutants from the developing Earth       
D.the compounds moved to the water

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 .
     
      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 inEngland in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled - 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 vapor 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.
 
It can be inferred from the first paragraph that _______.
A.water vapor is an air pollutant in localized areas
 
B.the definition of air pollution will continue to change
C.most air pollutants today can be seen or smelled
D.a substance becomes an air pollutant only in cities

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 .
     
      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 inEngland in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled - 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 vapor 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.
 
The word "adversely" in the first paragraph is closest in meaning to _______.
A.admittedly        
B.quickly        
C.considerably
D.negatively

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 .
     
      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 inEngland in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled - 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 vapor 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.
 
What does the passage mainly discuss?
A.What constitutes an air pollutant                          
B.The economic impact of air pollution.
C.How much harm air pollutants can cause. 
D.The effects of compounds added to the atmosphere

      British families started  going on holiday to the seaside around the middle of the 19th century. The invention of the railways (1) ____ this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (2) ____  of illness, and doctors recommended bathing in the sea and drinking sea water. Also to (3) ____ their knowledge, families attended concerts and read books from the library.
      At that time, ordinary working people had very little time (4) ____ work. However, in 1871, the government introduced four ‘Banking Holiday’ - national holiday days. This (5) ____ people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first, they went on day-trips, taking (6) ____ of special cheap tickets on the railways. By the 1880s, rising incomes (7) ____ that many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (8) ____ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (9) ____ offer and holidaymakers went to have fun.
     Today the English seaside (10) ____ popular, with more than 18 million holidays taken there each year.

A.stays     
 
B.continues               
C.lasts                       
D.remains

      British families started  going on holiday to the seaside around the middle of the 19th century. The invention of the railways (1) ____ this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (2) ____  of illness, and doctors recommended bathing in the sea and drinking sea water. Also to (3) ____ their knowledge, families attended concerts and read books from the library.
      At that time, ordinary working people had very little time (4) ____ work. However, in 1871, the government introduced four ‘Banking Holiday’ - national holiday days. This (5) ____ people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first, they went on day-trips, taking (6) ____ of special cheap tickets on the railways. By the 1880s, rising incomes (7) ____ that many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (8) ____ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (9) ____ offer and holidaymakers went to have fun.
     Today the English seaside (10) ____ popular, with more than 18 million holidays taken there each year.

A.on        
B.to
C.in
D.for

      British families started  going on holiday to the seaside around the middle of the 19th century. The invention of the railways (1) ____ this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (2) ____  of illness, and doctors recommended bathing in the sea and drinking sea water. Also to (3) ____ their knowledge, families attended concerts and read books from the library.
      At that time, ordinary working people had very little time (4) ____ work. However, in 1871, the government introduced four ‘Banking Holiday’ - national holiday days. This (5) ____ people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first, they went on day-trips, taking (6) ____ of special cheap tickets on the railways. By the 1880s, rising incomes (7) ____ that many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (8) ____ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (9) ____ offer and holidaymakers went to have fun.
     Today the English seaside (10) ____ popular, with more than 18 million holidays taken there each year.

A.board        
B.accommodate        
C.lodge                     
D.cater

      British families started  going on holiday to the seaside around the middle of the 19th century. The invention of the railways (1) ____ this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (2) ____  of illness, and doctors recommended bathing in the sea and drinking sea water. Also to (3) ____ their knowledge, families attended concerts and read books from the library.
      At that time, ordinary working people had very little time (4) ____ work. However, in 1871, the government introduced four ‘Banking Holiday’ - national holiday days. This (5) ____ people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first, they went on day-trips, taking (6) ____ of special cheap tickets on the railways. By the 1880s, rising incomes (7) ____ that many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (8) ____ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (9) ____ offer and holidaymakers went to have fun.
     Today the English seaside (10) ____ popular, with more than 18 million holidays taken there each year.

A.meant   
B.resulted       
C.produced    
D.caused

      British families started  going on holiday to the seaside around the middle of the 19th century. The invention of the railways (1) ____ this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (2) ____  of illness, and doctors recommended bathing in the sea and drinking sea water. Also to (3) ____ their knowledge, families attended concerts and read books from the library.
      At that time, ordinary working people had very little time (4) ____ work. However, in 1871, the government introduced four ‘Banking Holiday’ - national holiday days. This (5) ____ people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first, they went on day-trips, taking (6) ____ of special cheap tickets on the railways. By the 1880s, rising incomes (7) ____ that many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (8) ____ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (9) ____ offer and holidaymakers went to have fun.
     Today the English seaside (10) ____ popular, with more than 18 million holidays taken there each year.

A.opportunity     
B.advantage   
C.profit          
D.benefit

Finish each of the following sentences in such a way that it means the same as the sentences printed before it
He left quietly, so that he wouldn’t disturb the children.
 → So as ....................................................................................................................
A.
B.
C.
D.