After gradual declension down to about 39 hours in 1970, the workweek in the United States has steadily increased to the point that the average worker now puts in an estimated 164 extra hours of paid labor a year.
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AAfter gradual declension down
分析该选项
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BFollowing a gradual declension down
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CAfter gradual declining down
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DAfter gradually declining
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EFollowing gradually declining
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显示答案
正确答案: D