1。in 1981 children in the US spent an average of slightly less than two and a half hours a week doing household chores; by 1997 they had spent nearly six hours a week
chores; by 1997 that figure had grown to nearly six hours a week
chores; whereas nearly six hours a week were spent in 1997
chores, compared with a figure of nearly six hours a week in 1997
chores, that figure growing to nearly six hours a week in 1997
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发表于 2005-12-12 16:35:00
