高等教育 / 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
参考答案：
佳题速递：