全国英语等级考试PETS3真题练习
Part D
Directions:
Read the following text from which 10 words have been removed. Choose from the words A-O the most suitable one to fill each numbered gap in the text (46-55). There are FIVE extra words that you do not need to use. Mark your answers on your ANSWER SHEET 1.
With the world s population estimated to grow from six to nine billion by 2050, researchers,businesses and governments are already dealing with the impact, this increase will have on every-thing from food and water to infrastructure (基础设施)and jobs. Underling all this 46 will be the demand for energy, which is expected to double over the next 40 years.
Finding the resources to meet this demand in a 47, sustainable way is the cornerstone (基石 ) of our nation s energy security, and will be one of the major 48 of the 21st century. Alternative forms of energy-bio-fuels, wind and solar, to name a few--are 49 being funded and developed, and will play a growing 50 in the world s energy supply. But experts say that even when 51 , alternative energy sources will likely meet only about 30% of the world s energy needs by 2049.
For example, even with 52 investments, such as the $ 93 million for wind energy development 53 in the American Recovery and Reinvestment Act, important alternative energy sources such as wind and bio fuels 54 only about 1% of the market today.
Energy and sustainability experts say the answer to our future energy needs will likely come from a lot of 55 --both traditional and alternative.
A. stable
B. solutions
C. significant
D. role
E. progress
F . marvelous
G . included
H.growth
I .exactly
J .consist
K. comprise
L . competitions
M. combined
N. challenges
o.certainly
Part D
参考译文
据估计，到2050年，世界人口将从60亿增长至90亿，研究人员、企业和各国政府已经开始着手应对人口增长会对从食物、水资源到基础设施及就业等各方面带来的影响。在这一增长的背后将是对能源的需求，这种需求预计在未来的40年内将翻一番。
找到能够稳定而持续地满足这种需求的资源是我们国家能源安全的基石，也将是21世纪的`主要挑战之一。这些可替代能源，如生物燃料、风能和太阳能，必定将会得到投资和发展，并且将在世界能源供应中扮演着越来越重要的角色。但是专家指出，即使将所有可替代能源都结合起来，到2050年，或许只能满足世界能源需求的30%左右。
例如，即使有了大额投资，如《美国复苏与再投资法案》通过的为开发风能的9300万美元投资，像风能和生物燃料这样的重要可替代能源却仅占了当今市场份额的l%。
能源和可持续发展方面的专家称，要满足将来的能源需求，可能要依赖于多种解决方案，既包括传统能源又包括可替代能源。
答案及解析
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