She wrote second book, which turned out to be still popular with young.A. the; theB. a;

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A. the; the
B. a; 不填
(答案→)C. a; the
D. the; 不填
解析：
试题分析;考查冠词。固定结构：“a+序数词+time”再一次，又一次；“the+形容词”一类人。句意：她有写了一本书，结果这本书很受年轻人的欢迎。故C正确。