It was only when I reread his poem recently to appreciate its beauty.
A. that I began
B. did I begin
C. I began
D. until I began
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(答案→)A. that I began
B. did I begin
C. I began
D. until I began
解析：这题考查强调句，句型是：It was+强调部分+that…,强调的是：only when I reread his poem recently，句意是：只有我最近重新读他的诗我才开始欣赏它的美。选A。