Father, have you seen my dictionary? I _______ the whole house but _______ it.

1. A.
   searched; didn't find
2. B.
   had searched; didn't find
3. C.
   searched; haven't found
4. D.
   have searched; haven't found

Father, have you seen my dictionary? I ________ the whole house but ________ it.

[　　]

A．searched; didn't find

B．had searched; didn't find

C．searched; haven't found

D．have searched; haven't found