A nuclear family is (S1) ______ in highly-industrialized societies. Beginning in the early 20th century, the two-parent family (S2) ______ as the nuclear family was the predominant American family type. (S3) ______ children live with their parents until they go away to a college or university, or until they (S4) ______ jobs and acquire a(n) (S5) ______ or home of their own. In the early mid-20th century, the father was typically the (S6) ______ wage-earner, and the mother was the Children’s (S7) ______ caregiver. Today, often both parents hold jobs. Dual-earner families are the predominant type for families with children in the United States. Increasingly, one of the parents has a non-standard shift, that is, a shift that does not start in the morning and end in the late afternoon. In these families, one of the parents (S8) ______ the children while the other works. Prior to school, adequate day care of children is (S9) ______ for dual-earner families. In recent years, many private companies and home-based day care centers have sprung up to fulfill this need. Increasingly, companies are getting (S10) ______ in the arrangement of day care. Governments are providing assistance to parents that require day care as well.