—I rang you at about nine, but there was no reply.—Oh, that was probably       I was seeing the doctor.

We haven't settled the question of ______________ it is necessary for him to study abroad. 

They put forward a lot of plans at the meeting, none of _______ were carried out in their work.

Is this hotel _____ offered you a job ______ you stayed the first time you arrived here?

 It seemed to me that she was in doubt ________ Timmy lived or died.