24. Much time _____ sitting at a desk, office workers are generally troubled by health problems.
A
being spent
B
having spent
C
spent
D
spending
句意:上班族们坐在办公桌前太久,一般会受到健康问题的困扰。分析句子结构可知,分词的逻辑主语和后面主句的主语不一致,应用独立主格结构。分词主语和分词动作之间构成逻辑上的动宾关系,且动作已完成,故用过去分词。故选C项。
掌握句子意思和独立主格结构。
对独立主格结构掌握不够牢固,非谓语时态不明。