单选题 The local government has always placed a strong emphasis ______ education and vocational training.
【正确答案】 C
【答案解析】[考点] 固定搭配
[解析] place an emphasis on sth. 为固定搭配。介词on不可替换,故选C。
和emphasis同词根的词后面的介词一律要用on。