Read the passage and choose the option that best fits the gaps.
In the United States today, more than half of mothers with young children work, compared to about one third in the 1970s. Working mothers are now the rule rather than the exception. Women have been moving into the workforce not only for career satisfaction ___(1)___ because they and their families need the income.
In many families today, mothers continue to work because they have careers that they have spent years ___(2)___. Some women return to work soon after giving birth because they know that most employers in this country are not ___(3)___ to working mothers who wish to take time off to be with their young children. If these women stop working, even for several months, they may ___(4)___ some of the advantages they have earned or risk losing certain career opportunities.
As a greater number of women enter the workforce and stay there, more and more children ___(5)___ for by adults other than their parents. Relatives sometimes take on child care duties, or children are cared for in a variety of child care settings. Not surprisingly, working mothers are more likely to have their infants and toddlers in an out-of-the-home child care center than unemployed mothers.