While reading, you can make a mark _____ you have a question.

   A. the place where       B. what       C. that       D. where

 While reading, you can make a mark _____ you have a question.

   A. the place where       B. what       C. that       D. where

 While reading, you can make a mark _____ you have a question.

   A. the place where    B. what                     C. that       D. where

While reading, you can make a mark ________ you have a question．

1. A.
   the place where
2. B.
   what
3. C.
   that
4. D.
   where

24．While reading, you can make a mark _____ you have a question．

       A．the place where         B．what          C．that            D．Where