Much time______sitting at a desk, office workers are generally troubled by health problems.

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问题 Much time______sitting at a desk, office workers are generally troubled by health problems.

选项 A、being spent
B、having spent
C、spent
D、spending

答案C

解析 句意:由于花了许多时间坐在桌旁,办公室人员普遍受到健康问题的困扰。动词spend与逻辑主语much time之间构成被动关系,所以用过去分词作状语,构成“名词+过去分词”的独立主格结构。
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