Only when I read this story for a second time to appreciate its beauty.
A. had I began
B. that I began
C. I began
D. did I begin
网友回答
A. had I began
B. that I began
C. I began
(答案→)D. did I begin
解析：考查倒装句，only放句首时，主句要用部分倒装句，即提前助动词或者情态动词到主语之前
根据when I read可知，主句要用一般过去时。
句意为，只有当我读了两遍这个故事的时候，我才开始欣赏到他的美。