With her eyes       the work attentively, she didn't know what was happening outside.
A．fixed onB．focusedC．fixing onD．focusing
A
考查分詞結(jié)構(gòu)。Fix one’s eyes on…注意力集中于…;eyes與focus構(gòu)成被動(dòng)關(guān)系，on 也不能省略。句意：因?yàn)樗淖⒁饬Χ技性诠ぷ魃�，她不知道外面發(fā)生的事情。
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