III. Reading Comprehension
Directions:For each blank in the following passages there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.
When we think of green buildings, we tend to think of new ones----the kind of modern, solar-paneled masterpieces that make the covers of architecture magazines．But the US has more than 100 million existing homes, and it would be incredibly 51 to tear them all down and 52 them with greener versions．
An enormous amount of energy and resources went into the construction of those houses．And it would take an average of 65 years for the 53 carbon emissions (排放) from a(an) __54 _ energy-efficient (节能) home to make up for the 55 lost by destroying an old one．
So in the broadest sense, the greenest home is the one that has already been built．But at the same time, 56 half of US carbon emissions come from heating, cooling and powering our 57 , offices and other buildings．"You can't deal with climate 58 without dealing with existing buildings," says Richard Moe, the president of the National Trust．
With some exceptions, the oldest homes tend to be the 59 energy-efficient．Houses built before 1939 use about 50% more energy per square foot than those built after 2000, mainly due to the tiny cracks and gaps that 60 over time and let in more outside 61 .
62 , there are a vast number of relatively simple changes that can green older homes, from 63 ones like Lincoln's Cottage to your own postwar home．And efficiency upgrades (升级) can save more than just the earth; they can help 64 property owners from rising power 65 .
51. A. terrible B．wasteful C．wonderful D．useful
52. A．put B．build C．replace D．take
53. A．reduced B．increased C．used D．destroyed
54. A．old B．fashionable C．new D．beautiful
55. A．magazines B．trees C．materials D．resources
56. A．nearly B．hardly C．rarely D．mostly
57. A．libraries B．schools C．homes D．stores
58. A．improvement B．appearance C．stability D．change
59. A．most B．really C．very D．least
60. A．expand B．narrow C．strengthen D．weaken
61. A．dust B．air C．smoke D．water
62. A．Oppositely B．Unfortunately C．Fortunately D．Frankly
63. A．historic B．worthless C．ordinary D．meaningless
64. A．charge B．protect C．punish D．warn
65. A．prices B．costs C．businesses D．bargains