Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27.

Many people today would like the traditional two-parent family back, that is to say, they want a man and a woman to (23)______________ for life; they also think the man should support the family, and the woman should stay home with the children. However, few families now (24)_____________ 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 (25) ____________. And because people are staying single and living longer, there may be more one-person households. (26)________________ 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 (27) __________ 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.

Điền vào ô trống 27