John received an invitation to dinner, and with his work______, he gladly accepted it.

I watched everyone hurrying to and fro, most with eyes ____ the ground.

____ the crisis of economy getting more and more serious, the government is searching for ways to improve people’s life.

With everything she needed ________, she went out of the shop, with her hands full of shopping bags.

To our great relief, ______ time going on, more and more of the victims of the earthquake were rescued.