For each blank in the following passage there are four words or phrases marked A, B, C and D．Fill in each blank with the word or phrase that best fits the context．
In the past, most American mothers were at home to take care of their children during the day．Now, 1 , many mothers are working．More than half of the American women with young children have 2 outside the house．
American families solve the child care 3 in different ways．Some parents allow older children to stay at home alone after school．The parents 4 make sure that their children, usually not younger than 10 years old, understand 5 rules and can deal with emergencies(紧急情况)．Other parents say they would 6 allow their children to be at home alone．They usually 7 someone to take care of the children．
Some parents in the U．S．find their own ways to cut the cost of child care．They join child care 8 ．Each person in the group 9 for the children of other group members at different times．Some parents ask local churches, schools and social organizations to help 10 activities for the children．These child care choices often cost 11 or no money．Many American parents, however, still struggle with the problem of 12 good child care at a reasonable price．
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