英语阅读理解The traditional U.S.household made up of a married .

英语阅读理解The traditional U.S.household made up of a married .
The traditional U.S.household made up of a married couple with children has become less and less,a reflection of more women working and a view that marriage is not always desirable,researchers said on Wednesday.
The most common living arrangement in the United States consists of unmarried people and no children,which made up one-third of all households in 1998,double the percentage in 1972.
Meanwhile,the traditional nuclear family - a married couple with children - made up 26 percent of households in 1998,down from 45 percent in 1972,according to a survey concluded by the National Opening Research Center at the University of Chicago.
Timothy Smith,director of the survey,attributed the trend to more women in the work force,driven there by economic necessity and a desire for career,and a relaxation of social attitudes that frowned on cohabitation and on having children outside marriage.
Marriage has declined as the central custom under which households are organized and children are raised,” Smith said,noting the survey found that 62 percent of working class adults reported being married in the 1994-1998 period,down from 80 percent in the 1972-1977 period.
“People marry later and divorce and cohabitate more.A growing proportion of children has been born outside of marriage.Even within marriage the changes have been profound as more and more women have entered the labor force and gender roles have become more similar between husbands and wives,” Smith said.
51.The traditional nuclear family made up _______ of households in 1972.[31].
A.33.3% B.16.7% C.26% D.45%
52.More women come into the work force because of ____________.[32].
A.economic necessity B.a relaxation of social attitudes
C.a desire for career D.All of the above
53.What does the word “cohabitation” (Line 3,Para.4) mean?[33].
A.living together B.having drug together
C.bad habits D.same habits
54.Which of the following is TRUE according to the passage?[34].
A.People marry at later age.
B.More children are born outside marriage.
C.Wives have a higher status within family.
D.All of the above.
55.The author writes the passage in a(n) _______ tone.[35].
A.matter-of-fact B.emotional
C.critical D.indifferent

1 B 2 D 3 A 4 D 5 A