Tourists today flock to see the two falls that actually constitute Niagara falls.
Only one of our gifted students______to participate in the final competition.
The boat was sailing north when a terrible storm_____________ .
The word "allocated" in the passage mostly means "______".
Education in many countries is compulsory________the age of 16.
______ one of the most beautiful forms of performance art, ballet is a combination of dance and mime performed to music.
_______ has been a topic of continual geological research.
Standing on the tip of the cape,____________________ .
The examination was not very difficult, but it was_____________________ long.
The phrase "keeps sellers on their toes" in the passage mostly means "______".
As a millionaire who liked to show off her wealth, Mrs. Smith paid______________________________________________ we asked.