We will encourage every school to ______ its character, ethos and areas of special interest within a more flexible National Curriculum framework.

【正确答案】 B

【答案解析】 解答该题的关键是根据宾语的特点来确定答案。本句子中提到了 character, ethos and areas of special interest，选项中只有enhance与此搭配符合逻辑，故答案为B。