56 C) call for effective measures to ensure sea turtle's survival.

　　57 C) College education is rewarding in spite of the starting costs.

　　58 D) The gap between the earnings of college and high-school graduates narrowed

　　59 A)save more on tuition.

　　60 D)consider college education a consumer product

　　61 B)A satisfying experience with their budgets

　　完形填空：

　　62 C massive

　　63 B endeavors

　　64 D bound

　　65 A facilitated

　　66 C exclusive

　　67 B connects

　　68 C individuals

　　69 A and

　　70 C origins

　　71 B stood for

　　72 A exchange

　　73 D whose

　　74 C attracted

　　75 B which

　　76 A joined

　　77 D then

　　78 D As

　　79 C messages

　　80 B civilian

　　81 A into