Mary _______ her mother with the housework, but she didn’t.
The shop-assistant was straight with his customers. If an article was of _____ quality, he'd tell them so.
. What you have done is _____ the doctor's orders.
. The police refused to _____ the clues they were working on.
. Driving a car without insurance can have _____ consequences.
. Probability is the mathematical study of the _____ of an event's occurrence.