He is always full of as though he never knew tiredness.A. strengthB. energyC. forceD. pow

问题补充：

He is always full of as though he never knew tiredness.

A. strength

B. energy

C. force

D. power

答案：

A. strength

(答案→)B. energy

C. force

D. power

解析：strength体力，气力；energy精力，活力；force武力；power电力，能力。