![Untillateinthe20thcentury,mostAmericansspenttimewithpeo...]( "Untillateinthe20thcentury,mostAmericansspenttimewithpeo...")
- 问题详情：Untillateinthe20thcentury,mostAmericansspenttimewithpeopleofgenerations.Nowmid-agedAmericansmaynotkeepintouchwitholdpeopleuntiltheyareoldthemselves.That’sbecausewegrouppeoplebyage.Weputourthree-year-oldstogetherinday-carecenter,our13-year-ol...
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