Mary, could you tell me if your mother_____ our school sports meeting tomorrow–I think she will come to school if she_____ free.

tuation is _________—we have no food,very little water and no medical supplies

It is the bus driver who should ______ the safety ofthe passengers.

The expressions they use might whom they are speaking to or how well they know each other.

Explorer Robert Ballard searched the sunken ship—the Titanic for more than 20 years and also, with his cameras, he _____ the hole along the side of the ship which had caused it to fill with water and sink