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填空题
Why were the Americans in 1910 thinner than today?Because they worked ____ physically.
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参考解析
解析：
细节辨认题。本题问1910年的美国人比今天的美国人瘦的原因。录音中提到“In those days people worked harder physically”，在那时候人们做更好多的体力活动，故应填harder。
细节辨认题。本题问1910年的美国人比今天的美国人瘦的原因。录音中提到“In those days people worked harder physically”，在那时候人们做更好多的体力活动，故应填harder。
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