Mark Twain ___ the years after the civil war the "Gilded Age"

• called

• calling

• he called

• his calls

Early ___ toes instead of hooves on their feet.

• horses

• had horses

• horses had

• horses having

___ grow close to the ground in the short Arctic Summer.

• Above tundra plants

• Tundra Plants

• Tundra plants are found

• For tundra plants

In 1867, ___ Alaska from the Russians for $7.2 million.

• purchased the United States

• to purchase the United States

• The United States' purchase

• the United States purchased

Between 1725 and 1750, New England witnessed an increase in the specialization of ___

• occupies

• they occupied

• it occupied them

• occupations

The large carotid artery ___ to the main parts of the brain.

• carrying blood

• blood is carried

• carries blood

• blood carries

___ radio as the first practical system of wireless telegraphy.

• Marconi's development

• The development by Marconi

• Developing Marconi

• Marconi developed

In 1975, the first successful space probe to ___ beginning to send information back to earth.

• Venus

• Venus the

• Venus was

• Venus it was

The two biggest resort ___ Arkansas are Hot Springs and Eureka Springs.

• in

• towns are

• towns in

• towns are in

NASA's Lyndon B. Johnson space center ___ control center for the Mercury, Gemini, and Apollo space flights.

• it was

• it was the

• was the

• the