28. According to Paragraph 5, grade forgiveness enables colleges to____.

28.【答案】[A] obtain more financial support. 

【解析】根据题干关键词“paragraph 5”，“grade forgiveness”及“colleges”可回文定位至第五段第一、二句。第五段第一句“grade forgiveness satisfies colleges’ own needs”，可知grade forgiveness满足了学校自身的需求。第二句“For public institutions, state funds are sometimes tied partly to their success on metrics such as graduation rates and student retention—so better grades can, by boosting figures like those, mean more money”，可以看出，“grade forgiveness”使大学能够获得更多的国家基金，这也是学校的需求，与A选项“获得更多的经济支持”匹配，因此正确答案选A。