Afterin the new course reform for many years, the English teacher published over 30 books.

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A. buried
B. being buried
C. having buried
(答案→)D. having been buried
解析：考查分词用法。be buried in致力于；After是介词，后面使用动名词的形式，根据句意说明使用完成式。句意：致力于新课程改革很多年，那位英语老师出版了30多本书。根据句意说明D正确。