Many people today would like the traditional two-parent family back, that is to say, they want a man and a  woman to (1)     for life; they also think the man should support the family, and the woman should stay home with the children. However, few families now (2)     in the this category. In fact, if more women decide to have children on their own, the single-parent household may become more typical than the traditional family in many countries. Also, couples may decide to have more children, or they might take in foster children or (3)     . And because people are staying single and living longer, there may be more one-person households. (4)    the other hand, some people believe that similar events happen again and again in history. if this is true, people may go back to the traditional (5)     or nuclear family of the past. Others think that the only certainty in history is change. in other words, the structure of the future family could begin to change faster and faster and in more and more ways.

(5) ..................

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