填空题

Back in the day, a good report card earned you a parental pat on the back, but now it could be money in your pocket. Experiments with cash incentives (激励) for students have been catching on in public-school districts across the country, and so has the debate over whether they are a (47) tool for hard-to-motivate students.
According to a study (48) today by the social-policy research group MDRC, a non-profit organization, cash incentives combined with counseling offered "real hope" to low-income and nontraditional students at two Louisiana community colleges.
The program (49) by the Louisiana Department of Social Services and the Louisiana Workforce Commission was simple: enroll in college at least half-time, (50) at least a C average and earn 1,000 a semester for up to two terms. Participants, who were randomly (51) , were 30% more likely to register for a second semester than were students who were not offered the supplemental financial (52) . And the participants who were first offered cash incentives in spring 2004--and thus whose progress was tracked for longer than that of subsequent groups before Hurricane Katrina (53) forced researchers to suspend the survey for several months in August 2005--were also more likely than their peers to be enrolled in college a year after they had finished the two-term program.
Students offered cash incentives in the Louisiana program earned more (54) and were more likely to attain a C average than were nonparticipants. And they showed psychological (55) too, reporting more positive feelings about themselves and their abilities to (56) their goals for the future.

• A) maintain
• B) brilliant
• C) cooperative
• D) claim
• E) aid
• F) selected
• G) retain
• H) abruptly
• I) credits
• J) fulfilled
  K) benefits L) accomplish M) released N) naturally O) funded