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

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问题     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【C1】______tool for hard-to-motivate students.
    According to a study【C2】______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【C3】______by the Louisiana Department of Social Services and the Louisiana Workforce Commission was simple: enroll in college at least half-time,【C4】______at least a C average and earn $1,000 a semester for up to two terms. Participants, who were randomly【C5】______, were 30% more likely to register for a second semester than were students who were not offered the supplemental financial【C6】______. 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【C7】______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【C8】______and were more likely to attain a C average than were nonparticipants. And they showed psychological【C9】______too, reporting more positive feelings about themselves and their abilities to【C10】______their goals for the future.
A) abruptly E) brilliant I) fulfilled M) released
B) accomplish F) claim J) funded N) retain
C) aid G) cooperative K) maintain O) selected
D) benefits H) credits L) naturally
【C4】

选项

答案K

解析 此处应为动词原形,与enroll和earn并列。空后的C average是成绩水平。动词原形选项中,claim和aid词义不符题意,可首先排除;accomplish强调完成既定的任毋或目标,retain指面对危险或威胁继续保有某物,maintain可用于“保持”成绩水平,故maintain最合适。
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