He is always full of as though he never knew tiredness.A. strengthB. powerC. forceD. ener

问题补充：

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

A. strength

B. power

C. force

D. energy

答案：

A. strength

B. power

C. force

(答案→)D. energy

解析：考查名词：strength体力，气力；power电力，能力。force武力； energy精力，活力； be full of energy精力充沛的，句意：他总是精力充沛好像从来不知道累。选D。