Much time ________ sitting at a desk, office workers are generally troubled by health problems. A.sp...
2022-06-25 02:43:21 209次 黑龙江省2019-2020学年高三上学期期末英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Much time ________ sitting at a desk, office workers are generally troubled by health problems.
A.spent B.is spent C.has been spent D.having spent
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