Many countries are increasing their use of natural gas, wind and other forms of .
A. energy
B. power
C. force
D. strength
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(答案→)A. energy
B. power
C. force
D. strength
解析:A. energy精力,能源,B. power权力,力量,C. force武力,力量,D. strength体力,力气,句意:句意:很多国家正在增加天然气,风和其他能源形式的使用。选A。