Whichever approach is adopted, each student will require material and______which is at his level.
【正确答案】 D
【答案解析】解析：句意：不论采用哪种方法，每位学生都需要与自己水平相当的素材和内容分配。allocation分配，配置。presentation陈述，表达。constituent委托人；要素。compound混合物，化合物。