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    精英家教网 > 高中英语 > 题目详情
    I am concerned ____ it that I can’t concentrate ____ my work because of headache.
    A．of; onB．of; ofC．about; onD．about; to
    C

    试题分析：考查介词：句意：我担心因为工作我不能专心工作。Be concerned about关心，concentrate on 集中精力于……；专心于……选C。
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