I realized the purpose of the whole experience: I needed to learn to open my heart and give love without requiring anything .
A. by design
B. for once
C. in return
D. as a consequence
网友回答
A. by design
B. for once
(答案→)C. in return
D. as a consequence
解析：考查介词辨析。A故意地；B仅仅一次；C作为回报；D结果是；句意：我意识到这个经历的重要性，我需要学会开放我的内心，不希望任何回报的付出我的爱心。根据句意说明C正确。