--- You are always full of . Can you tell me the secret?
--- Taking plenty of exercise every day.
A. force
B. energy
C. strength
D. power
网友回答
A. force
(答案→)B. energy
C. strength
D. power
解析：考查名词：A. force 武力，B. energy精力，C. strength力量， D. power权力，句意：--你真是精力充沛，你能告诉我秘密吗？--每天锻炼。Be full of energy精力充沛。选B。