单项选择题

Prepaid college tuition is generally designed on the principle that ______.

A．it is easy to pay at the present time
B．it is economical in the long nm
C．is saves pains to pass the entrance exam
D．it ensures the admission to the college

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单项选择题

Colorado now has told participants in the prepaid tuition plan that ______.

A．they would not have to make any other payment later
B．they would not be guaranteed against further payment
C．the plan would cover further tuition increases
D．the plan would be replaced by a guaranteed investment contract

单项选择题

The word investors (in boldface in Paragraph 2) most exactly refers to those who ______.

A．serve as the main source of finance to the state
B．invest money in developing local colleges
C．sponsor colleges and their educational programs
D．join the plan and pay the tuition is advance