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【单选题】

I can't ______ what I am doing because it is so noisy here.
A．concentrate

B．concentrate in
C．concentrate on
D．concentrate about
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根据网考网移动考试中心的统计，该试题：

14%的考友选择了A选项

16%的考友选择了B选项

62%的考友选择了C选项

8%的考友选择了D选项

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