Only when he read this novel for a second time to appreciate its beauty.
A. that he began
B. he began
C. had he begun
D. did he begin
网友回答
A. that he began
B. he began
C. had he begun
(答案→)D. did he begin
解析：这题考查only+状语从句+部分倒装句的用法，句意是：只有当他第二次读到这篇小说，他才欣赏它的美。所以用 过去时，选D。