填空题


In many cultures, traditional families, that is, married couples with children, (1) . Until a decade ago, that was also the case in the United States. But the U.S. Bureau of Census reports people in more than (2) now live in some other arrangements.
For the first time in history, the number of Americans living alone has (3) of historically dominant households—married couples with children.
In 1960, 45% of American households (4) with children. Today it is less than 25%. In the past 10 years, the number of (5) has grown faster than the number of family households.
But the (6) that the American (7) . Although the rate of married-with-children household is still declining, it is declining (8) than during the 1960s and 1970s, and married couples with or without children still (9) all American households.
What really should be noted is actually (10) in a lot of the numbers in the past 10 years, compared to the structure of households 20 or 30 years before. And for example, in 1960, if we go back 47 years, (11) were married-couple households. The number (12) in 1970, and down to 60% in 1980. But then over the past two decades, the rate of decline has slowed down quite a bit: it went down to (13) and 52% in 2000.
The number of (14) is declining for several reasons. More than ever before, men and women are (15) . Also the number of (16) is growing much faster than the number of married couples. The 2000 census shows that (17) .
First the aging of the American population and the growing number of both young and old people living alone are the main reasons the average American household (18) , just over two and a half people per household. Some sociologists fear that the growing number of one-person households means (19) . Others see it as a sign of prosperity and an (20) .

【参考答案】

consisted of married couples