—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
I don‘t know the restaurant, but it’s ________to be quite a good one.
When ________different cultures, we often pay attention only to the differences without noticing the similarities.
No permission has ________for anybody to enter the building.
Having checked the doors were closed, and ________all the lights were off, the boy opened the door to his bedroom
________fashion differs from country to country may reflect the cultural differences from one aspect.