With her eyes the work attentively, she didn't know what was happening outside.
A. fixed on
B. focused
C. fixing on
D. focusing
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(答案→)A. fixed on
B. focused
C. fixing on
D. focusing
解析：考查分词结构。Fix one’s eyes on…注意力集中于…;eyes与focus构成被动关系，on 也不能省略。句意：因为她的注意力都集中在工作上，她不知道外面发生的事情。