单项选择题

According to the author, ______.

A．male and female roles in domestic tasks are biologically based
B．sex roles in economy reflect biological differences
C．sex roles in economy are socially not biologically determined
D．in all societies, sex roles follow similar patterns

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单项选择题

In the Western societies, ______.

A．women were gradually going into the business worlds at the beginning of 20th century
B．men regarded women pioneers in the women's movement as conservative
C．sex roles were not so distinct in business even in the 19th century
D．women pioneers began to go into fields like politics, law and banks early in the 19th century

单项选择题

In some of the West African societies, ______.

A．women do most of the trading
B．women seldom go to coffee houses
C．men dress like women
D．men live and sleep together