Until the start of the Industrial Revolution, mankind was poor, hungry, and constantly at the _______ of disease and natural disasters.
Your mother, however, ____ say that to us that day.
_____ with a good education can apply for the job.
He just does what he pleases and never _____ about anyone else.
They kept trying _____ they must have known it was hopeless.
An awful accident, however, _____occur the other day.