Can it have been on the playground ________ you lost your watch ?

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

 Can it have been on the sports ground _______ you lost your watch yesterday?

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

Can it have been on the playground ________ you lost your watch ?

A．that        B．on which        C．where     D．in that

Can it have been on the playground ________ you lost your watch ?

A．that                        B．on which            C．where                    D．in that