If you _____ her, we _____ out what was happening.[ ]

This math question is too difficult. Can you help me

Have you ___been to our town before?—No, it is the first time that I___ here

Each time, Billy Crystal performs his stand-up routine in front of millions of people when the show is broadcast _______ on TV.

It was some time _______ I realized the fact that Ihad been cheated by the salesman.