Although at times learning to play the piano Was tiring for me it was well worth he.A. eff

问题补充：

Although at times learning to play the piano Was tiring for me，it was well worth he.

A. effort

B. strength

C. intelligence

D. preparation

答案：

(答案→)A. effort

B. strength

C. intelligence

D. preparation

解析：考察名词辨析。A努力；B力气，优势；C智力；D准备；句义：尽管有时候学习谈钢琴对我来说很让人厌烦，但是还是值得所做的努力的。根据句义说明A项作者认为学习钢琴值得自己所做出的努力。A项符合上下文含义。