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题目内容
（南阳师范学院-教育学-大学英语（四））
He appreciated ____ the chance to deliver his thesis in the annual symposium on Comparative Literature.
(A) having given
(B) to have been given
(C) to have given
(D) having been given
(A) having given
(B) to have been given
(C) to have given
(D) having been given
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