填空题. Working-class families in the United States are usually nuclear, and many studies indicate that working-class couples marry for love, not for money. Upper-class couples may marry for love, but their commitment of love is sometimes compromised by the recognition of their marriage 1 as a way to preserve their class identity. Middle-class couples may also marry for love, but the overridden task of middle-class families is also 2 an economic thing—to enhance the earning power of the breadwinner. 3 Of course, working-class people are also affected by the economic realities for their families must operate like economic units as well. 4 However, the economic tasks of families are more a part of their dreams 5 about marriage than they are a part of the reality of their married life. Indeed, to many a working-class couples, love provides a way to escape 6 from the difficulties of their parents' home and starts their own family life. 7 Another distinctive feature of working-class families is the majority 8 of them have limited choices about the work available to them. Their "choices" are often the "leftovers" in the job market. People from working-class families do seek self-esteem and personal confirmation, and they come 9 to their jobs full of hopes. However, given the way which production 10 and consumption are organized in advancing societies like the U.S., members of the working-class often experience exploitation in struggling at jobs that may be less meaningful.