Sound comes in waves, and the higher the frequency,_______
The word "allocated" in the passage mostly means "______".
Michael looked deeply hurt and surprised when_____________________ .
As a millionaire who liked to show off her wealth, Mrs. Smith paid______________________________________________ we asked.
_______ has been a topic of continual geological research.
She asked me______I was looking at.
We all agree that she is____________________ student in our class.
The examination was not very difficult, but it was_____________________ long.
Regular exercise and good diet will bring______fitness and health.
In spite of her abilities, Laura has been_____________________ overlooked for promotion.
He_______________us but he was short of money at the time.