Most oxygen atoms have eight neutrons, but a small amount have nine or ten .
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.
There has been a great increase in retail sales,_____________________ ?
Supporters of free-market globalization point out that_____________________ .
Only one of our gifted students______to participate in the final competition.
The boat was sailing north when a terrible storm_____________ .
Standing on the tip of the cape,____________________ .
She asked me______I was looking at.
The pool should not be made so deep______small children can be safe there.
______ one of the most beautiful forms of performance art, ballet is a combination of dance and mime performed to music.