When you read a book you should make a mark you have any question.A. whereB. whichC. tha

问题补充：

When you read a book, you should make a mark you have any question.

A. where

B. which

C. that

D. what

答案：

(答案→)A. where

B. which

C. that

D. what

解析：考查状语从句。状语从句where you have any question修饰make a mark，句意：当你读书的时候，你应该在你有问题的地方做一个标志。故A正确。