本文为正在复习英语的同学整理了选词填空练习题,供大家参考。
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 everything from food and water to infrastructure and jobs. Underling all this 47 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 48 . sustainable way is the cornerstone of our nation s energy security, and will be one of the major 49 of the 21st century. Alternative forms of energy- bio-fuels, wind and solar, to name a few are 50 being funded and developed, and will play a growing 51 in the world s energy supply. But experts say that even when 52 , alternative energy sources will likely meet only about 30% of the world s energy needs by 2050.
For example, even with 53 investments, such as the $93 million for wind energy development 54 in the American Recovery and Reinvestment Act, important alternative energy sources such as wind and bio-fuels 55 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 56 both traditional and alternative.
注意:此部分试题请在答题卡2上作答。
A)stable I)exactly
B)solutions J)consist
C)significant K)comprise
D)role L)competitions
E)progress M)combined
F)marvelous N)challenges
G)included O)certainly
H)growth
答案:
47 growth 48 stable 49 challenges 50 certainly 51 role 52 combined 53 significant 54 included 55 comprise 56 solutions
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