— Could you tell me_____ ?               

— About half an hour.

  A. how long it takes to walk to the Science and Technology Museum from school

  B. how long it took to walk to the Science and Technology Museum from school

  C. how far was it to walk to the Science and Technology Museum from school

  D. how far it was to walk to the Science and Technology Museum from school

 ---Could you tell me _____?

   ---About two months.

   A. when are you leaving for Shanghai   B. how often you go to the school library

   C. how many tickets have you booked   D. how long you have been at this school

— Could you tell me_____ ?              

— About half an hour.

1. A.
   how long it takes to walk to the Science and Technology Museum from school
2. B.
   how long it took to walk to the Science and Technology Museum from school
3. C.
   how far was it to walk to the Science and Technology Museum from school
4. D.
   how far it was to walk to the Science and Technology Museum from school