单选题 Curriculum reforms in India took a more (nationalistic) turn (as) a (growing) number of foundation-sponsored private schools supplemented the government syllabus (by) studies of Indian culture, music, philosophy, and Sanskrit language.
【正确答案】 D
【答案解析】[解析] as引导的从句中主语为private schools，谓语为supplemented，宾语为government syllabus(syllabus大纲)，动词supplement通常与介词with连用，构成supplement…with…结构，指“用……增补(补充)”，因此D项中by应改为with。