While reading,you can make a mark __you have a question.
1个回答

where 在这儿是地点状语从句,

you can make a mark,在哪儿做标记?在有问题的地方,即where you have a question.

也可以用 at the place where you have a question.在这个结构中,where引导的就是定语从句了,修饰限定 the place.

能用the place where.这个结构构成名词性关系从句,而此句题干中少的是地点状语.