41. What best describes the author’s purpose in writing the passage?
1. To educate the reader about the danger of acid rain pollution in America
2. To show the results of a new study about the effects of acid rain in forests
3. To warn the reader about how much acid rain can damage the environment
4. To suggest ways to stop the problems which continue through the ecosystem and the
economic system
42. Which of the following is the main idea of the passage?
1. Damage from acid rain pollution is far worse than expected.
2. Calcium deficiency in plants results from acid rain pollution.
3. Acid rain is related to the decline of America’s forests in particular areas.
4. The problems of calcium-deficient plants material passed on to herbivores would be
extensive.
43. According to the passage, which of the following is true about acid rain?
1. Acid rain makes trees not easily attacked by disease.
2. Acid rain weakens the mechanism of some kinds of trees.
3. Acid rain can be found in every forest which has declined.
4. Acid rain depletes calcium in red spruce especially in winter.
44. Which of the following group consists of a tree that is NOT mentioned as being calcium
depleted?
1. white pine, sugar maple and red spruce
2. red spruce, white pine and eastern hemlock
3. sugar maple, flowering dogwood and balsam fir
4. eastern hemlock, silver fir and flowering dogwood
45. The word “assortment” (line 19) means __________.
1. extend
2. trouble
3. mixture
4. progress
46. The word “radiate” (line 21) means __________.
1. transport
2. spread
3. travel
4. shine
47. The word “their” (line 24) refers to __________.
1. food chains’
2. calcium deficiencies’
3. plants’
4. herbivores’
48. The quantity of mammals’ milk product could be changed because of __________.
1. their weaker bones
2. the change in the quality of their milk product
3. their consumption of calcium-deficient plant material
4. the competition and survival of populations in forests
49. According to the passage, what can be inferred about the future of America’s forests?
1. Climate change and pollutants will cause the most serious damage to America’s forests.
2. Some species of plants in several America’s forests might vanish due to cellular calcium
depletion.
3. The decline of forests and the problem about ecosystem caused by acid rain could be found
all over America’s forests.
4. The result of the immune response hypothesis shows that lives in America’s forests would
be affected by acid rain more than by humans.
50. The tone of the passage is __________.
1. concerned 2. supportive 3. emotional 4. indifferent
41. What best describes the author’s purpose in writing the passage?
1. To educate the reader about the danger of acid rain pollution in America
2. To show the results of a new study about the effects of acid rain in forests
3. To warn the reader about how much acid rain can damage the environment
4. To suggest ways to stop the problems which continue through the ecosystem and the
economic system
42. Which of the following is the main idea of the passage?
1. Damage from acid rain pollution is far worse than expected.
2. Calcium deficiency in plants results from acid rain pollution.
3. Acid rain is related to the decline of America’s forests in particular areas.
4. The problems of calcium-deficient plants material passed on to herbivores would be
extensive.
43. According to the passage, which of the following is true about acid rain?
1. Acid rain makes trees not easily attacked by disease.
2. Acid rain weakens the mechanism of some kinds of trees.
3. Acid rain can be found in every forest which has declined.
4. Acid rain depletes calcium in red spruce especially in winter.
44. Which of the following group consists of a tree that is NOT mentioned as being calcium
depleted?
1. white pine, sugar maple and red spruce
2. red spruce, white pine and eastern hemlock
3. sugar maple, flowering dogwood and balsam fir
4. eastern hemlock, silver fir and flowering dogwood
45. The word “assortment” (line 19) means __________.
1. extend
2. trouble
3. mixture
4. progress
46. The word “radiate” (line 21) means __________.
1. transport
2. spread
3. travel
4. shine
47. The word “their” (line 24) refers to __________.
1. food chains’
2. calcium deficiencies’
3. plants’
4. herbivores’
48. The quantity of mammals’ milk product could be changed because of __________.
1. their weaker bones
2. the change in the quality of their milk product
3. their consumption of calcium-deficient plant material
4. the competition and survival of populations in forests
49. According to the passage, what can be inferred about the future of America’s forests?
1. Climate change and pollutants will cause the most serious damage to America’s forests.
2. Some species of plants in several America’s forests might vanish due to cellular calcium
depletion.
3. The decline of forests and the problem about ecosystem caused by acid rain could be found
all over America’s forests.
4. The result of the immune response hypothesis shows that lives in America’s forests would
be affected by acid rain more than by humans.
50. The tone of the passage is __________.
1. concerned 2. supportive 3. emotional 4. indifferent
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