Most American fanilies are smaller than the famili

问题补充：

Most American fanilies are smaller than the families in other countries.Most Amerrican families have one ro two children each.Children in the US will leave their parents home when they grow up.They u

答案：

1.A2.B3.D4.B5.A======以下答案可供参考======

供参考答案1:

ABDBA