The police got to ________ was once an old yard that the workers used as a store．

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

 The police got to _______________ was once an old yard that the workers used as a store.
    A. what           B. where            C. that              D. which

The police got to _______________ was once an old yard that the workers used as a store.
A. what       B. where        C. that          D. which

The police got to _________ was once an old yard_________ the workers used as a store.

 A. what ; where     B. which;  where    C. that   ; that    D. what;  which