(48. SUPPOSE) ______
Standing on the tip of the cape,____________________ .
Only one of our gifted students______to participate in the final competition.
__________ John Kennedy was elected president, he was the youngest American President ever.
We all agree that she is____________________ student in our class.
______ his brother, Mike is active and friendly.
The examination was not very difficult, but it was_____________________ long.
Michael looked deeply hurt and surprised when_____________________ .
_______ has been a topic of continual geological research.
As a millionaire who liked to show off her wealth, Mrs. Smith paid______________________________________________ we asked.
The phrase "keeps sellers on their toes" in the passage mostly means "______".