[单项选择]The flood of women into the job market boosted economic growth and changed U.S. society in many ways. Many in-home jobs that used to be done (47) ________ by women — ranging from family shopping to preparing meals to doing (48) ________ work — still need to be done by someone. Husbands and children now do some of these jobs, a (49) ________ that has changed the target market for many products. Or a working woman may face a crushing "poverty of time " and look for help elsewhere, creating opportunities for producers of frozen meals, child care centers, dry cleaners, financial services, and the like. Although there is still a big wage (50) ________ between men and women, the income working women (51) ________ gives them new independence and buying power. For example, women now (52) ________ about half of all cars. Not long ago, many car dealers (53) ________ women shoppers by ignoring them or suggesting that they come back with their husbands. Now car companies have realized that wo