老师你好:
What percent of the students do not exercise at all?
这句话中心词是students还是percent,哪个修饰哪个?
辛苦老师,谢谢。
What percent of the students do not exercise at all?
这句话中心词是students不是percent,即 What percent of 修饰the students,由于进行训练的是 students,不是 What percent of。