题目

People in the United States honor their parents with 2 special days: Mother's Day on the second Sunday in May and Father's Day on the 3rd Sunday in June. These days are to show love and respect for parents. They raise their children and educate them to be responsible citizens. They give love and care. These two days offer an opportunity to think about the changing roles of mothers and fathers. More mothers now work outside the home and more fathers must help with child-care. These two special days are celebrated in many different ways. On Mother's Day, people wear carnations. A red one symboli用5、6、7、0组成的四位数中，最大的是______，最小的是______．