                                   ĐỀ ÔN HỌC SINH GIỎI 12
                                       ĐỌC HIỂU SỐ 1
   Part 2. Read the following passage and answer the questions from 56 to 61
                                              Hot Days, Hot Nights
56. Paragraph A
Here is what global warming could do in a few years: in Dallas, a doubled level of carbon dioxide would increase
the number of days a year with temperatures above 100 degrees from nineteen to seventy-eight. On sixty-eight
days, as opposed to the current four, the temperature wouldn’t fall below 80 degrees at night. One hundred and
sixty-two days a year, the temperature would top 90 degrees.
57. Paragraph B
Although most scientists agree that increasing levels of carbon dioxide and other greenhouse gases will inevitably
lead to global warming, no one is certain how fast and how much temperatures will rise and what the effects will
be in any geographical areas. This gives policymakers an excuse for delaying action. Some experts predict that
within two centuries glaciers in the North and South Poles will melt, ocean levels will rise, and much of what is
now the coast of the United States will be under water. They also predict great droughts and hurricanes, as a result
of climate changes.
58. Paragraph C
Other scientists think the changes will be much more gradual, even beneficial. After all, Canada would not
complain if the productive corn-growing lands — now located in the U.S. Midwest - were shifted north across
the border.
59. Paragraph D
While many nations could end up with milder climates, the change — perhaps 100 times faster than at any time
in human history - could be so drastic that many of the benefits would be lost. There could be crowds of
environmental refugees, as well, making the tragedy of the Dust Bowl era seem mild in comparison.
60. Paragraph E
What can we do? Humanity’s contribution to the greenhouse effect comes from so many basic activities that we
can’t hope to eliminate it completely. Some steps have already been taken. Since the 1970s, the use of CFCs as
aerosol-can propellants has been banned in the United States.
61. Paragraph F
Another strategy is to burn as much methane as possible. This adds CO2 to the air, but since methane traps twenty
times as much heat as CO2 the net result is worthwhile. The gas in many garbage landfills is already being used
in a number of places around the United States. It is being used to heat thousands of homes.
For questions 56-61, choose the most suitable heading for each paragraph A-F from the list of headings
below. Write the appropriate numbers (I-VIII). Please note that there are more headings than you can
use.
I       Possible problems due to global warming
II      Warmer summer in Dallas
III     Help from methane
IV      One important step
V       Disagreement about temperatures
VI      Warmer and warmer in some places
VII     But possible benefits too
VIII Problems bigger than benefits
Your answers:
  56.              57.              58.               59.              60.               61.


For questions 62-65, Read the passage again and write:
YES          if the statement agrees with the writer;
NO           if the statement does not agree with the writer;
NOT GIVEN if there is no information about this in the passage.
      The number of days in Dallas with temperatures above 100 degrees           ______YES__
 0.   would increase.
 62. Currently in Dallas, there are only four days when the temperature falls    ____________
      below 80 degrees at night
 63. Some scientists are sure how fast the temperature will rise due to global   ____________
      warming.
 64. Policymakers are not at all interested in taking any action to solve the    ____________
      environmental problem.
 65. Some scientists think that the climate changes may even bring benefits.     ____________


                                   ĐỀ ÔN HỌC SINH GIỎI 12
                                       ĐỌC HIỂU SỐ 1
   Part 2. Read the following passage and answer the questions from 56 to 61
                                              Hot Days, Hot Nights
56. Paragraph A
Here is what global warming could do in a few years: in Dallas, a doubled level of carbon dioxide would increase