63．According to the text, Dollly Parton is ． (A)a well-known surgeon (B)a mother of a four-year-old (C)a singer born in Tennessee (D)a computer programmer

69．What can we learn about the middle class families from the text? (A)They blamed the government for the tuition increase． (B)Their income remained steady in the last decade． (C)They will try their best to send kids to college． (D)Their debts will be paid off within 25 years．