-- How are you planning to travel to Shanghai? 

-- I ______ yet, but I ______ taking a train.

1. A.
   didn’t decide; am considering
2. B.
   haven’t decided; consider
3. C.
   haven’t decided; am considering
4. D.
   hadn’t decided; have considered

--- How are you planning to travel to Shanghai?

  　--- I ______ yet, but I ______ taking a train.

  　A. didn’t decide; am considering    

     B. haven’t decided; consider

  　C. haven’t decided; am considering     

     D. hadn’t decided; have considered