Old people must be____ politely

Only after her mother came to help her for the first few months _____ to begin her project

Have you seen the film Under the Hawhorn Tree?—Of course, I have. It was in our village _____ it was made.

The Bakers intend to buy a house but _____ must be within their power.

I’m not familiar with this placeIt’s the first time I _____ here, you know