Much time __________ sitting at a desk, office workers are generally troubled by health problems. （1 分）<br>A. being spent <br>B. having spent <br>C. spent <br>D. spending

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题目内容（山东第一医科大学毕业补考试卷 2021级专升本《英语4（本）》）

Much time __________ sitting at a desk, office workers are generally troubled by health problems. （1 分）
A. being spent
B. having spent
C. spent
D. spending

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