The average spoken sentence in conversational English takes 2.5 seconds

William Torrey Harris was one of the first educators interested ___ a logical progression of topics in the school curriculum.

North American Indian tribes used sign language ___ with tribes that spoke a different language or dialect.

Art tends to be ___ more after the death of the artist, but most literary works tend to decrease in value when the writer dies.

Adult eagles let their offspring ___ nests near their original nesting area.

A barometer is a device with a sealed metal chamber designed to reading the changes in the pressure of air in the atmosphere.

If a person does not have an attorney, the court ___ one.

Since lightning was probably significant in the formation of life, understanding it might help us to understanding life itself.

Iowa ___ of flat-topped hills erected by the ancient Mound Builder people as temples and burial sites.

If the oxygen supply in the atmosphere was not replenished by plants, it would soon be exhausted.

___ the eight Ivy League schools are among the most prestigious colleges in the United States.

The Girl Scouts, which was found by Juliette Gordon Low in 1912, has grown to a current membership of more than three million girls.

To relieve pain caused by severe bums, prevent infection, and treat for shock, ___ immediate steps.

If gasoline vapor ___ with air, combustion will occur.

Vermont, commonly known as the Green Mountain State, refused ___ until 1791.

Air constricted between the vocal chords makes them ___ , producing sounds.