I wrote him a letter to show my of his thoughtfulness.A. consequenceB. potentialC. instru

问题补充：

I wrote him a letter to show my of his thoughtfulness.

A. consequence

B. potential

C. instruction

D. appreciation.

答案：

A. consequence

B. potential

C. instruction

(答案→)D. appreciation.

解析：考查名词：A. consequence后果，结果，B. potential潜能，C. instruction指导，D. appreciation. 指充分理解后作出的赞美，或以热情赞同、衷心欣赏、真诚感激做出的某种反应，意为“赞赏、感激”；句子意思：我写信给他对他周到的考虑表示真诚的感激。选D。