【正确答案】:
A. LIVING LAMENTS THE RADICAL CHANGES IN HIS TIME, THINKING THAT THE CHANGES HAVE TAKEN AWAY SOME OF THE MOST ENDEARED VALUES IN AMERICAN LIFE.
B. IRVING' S PERVASIVE THEME OF NOSTALGIA FOR THE UNRECOVERABLE PAST IS UNFORGETTABLE. 
【题目解析】:A. Living laments the radical changes in his time, thinking that the changes have taken away some of the most endeared values in American life. B. Irving' s pervasive theme of nostalgia for the unrecoverable past is unforgettable.