when you read a book,you'd better make a mark___you have any ques_英语解答

when you read a book,you'd better make a mark___you have any question
at which where
why?

人气：202 ℃　时间：2020-01-22 11:24:26

解答

B 在你有问题的地方做个标记,A的话,需要加上at which place