31、When I read a book,I like make a mark _____ I have any questions.A、at which B、at where C、th

问题描述:

31、When I read a book,I like make a mark _____ I have any questions.A、at which B、at where C、th
A,对吗.最好说明原因


介词加疑问代词等于疑问副词
make a mark at那能用 where 吗不能 介词不加疑问副词这种定语从句题一般都是介词加代词等于副词