the new life in Qingdao, the old man lived happily with his son after leaving his home in the countryside.
A. Accustomed to
B. Accustoming to
C. Having accustomed to
D. having used to
网友回答
(答案→)A. Accustomed to
B. Accustoming to
C. Having accustomed to
D. having used to
解析：考查过去分词做状语：根据语境与题意：习惯了在青岛的新生活，这个老人在离开乡村的家后和儿子快乐的生活。accustomed to意思是“习惯于”。accustomed to the new life in Qingdao 为过去分词短语，作原因状语，可知A 项正确，