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2013年下半年，英語四級將改革，局部題型發生變化。選詞填空在英語四級考試中，是考生們很難逾越的難關，很多考生做到這類題型都會選擇直接放棄。其實，只要大量練習，再加上歸納總結，選詞填空拿高分并不難。下面小編整理了選詞填空題型訓練，希望對考生們有幫助。
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 (基礎設施) 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 (基石) 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：此部分試題請在答題卡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
