6.________ himself with routine tasks, he had no time to accompany his children.
A.Occupying B.Occupied
C.Being occupied D.To be occupied
【答案】A
【解析】考查非谓语动词。句意：由于忙于常规工作，他没有时间陪伴孩子。短语occupy oneself with sth 与be occupied with sth都是"忙于……；从事于"之意，本题前一分句作原因状语从句。若使用第一种表达方式（"他"与"从事"之间为主动关系，动词使用现在分词形式），则表达为：Occupying himself with…；若使用第二种表达方式（occupied作为形容词"繁忙的；没空的"，位于句首作状语），则表达为：Occupied with routine tasks，…综上，结合所给选项分析可知本题答案为A选项。