[单项选择]While (remembering) mainly (for) the invention of the telephone, Alexander Graham Bell devoted his life (to) (helping the deaf). A. remembering B. for C. to D. helping the deaf
参考答案:A 答案解析:应改为remembered.根据主句主语Alexander Graham Bell和remember一词的逻辑关系,应该是被动关系,故改为过去分词remembered.