_________ when a person doesn't eat enough fruit and vegetables.

They decided to finish and finally ________ the hard evening with a pizza and a few sodas

The windmill, which has been used for hundreds of years to pump water and grind grains, ___________ redesigned to produce electricity.

In xerox printing, the ink becomes fused to the paper as soon as __________

The seating of musicians in an orchestra is arranged _________ to produce the desired blend of sounds from the various musical sections.

It is earth's gravity that _______ people their weight.

_______ were stones piled at intervals.

A vacuum will neither conduct heat nor ____________

Quasars _________ emitting extremely intense radio waves and visible radiation.

Only __________ of the breeds of cattle have been brought to the United States.

Neptune is an extremely cold planet, and _________

Deserts are often formed _________ they are cut off from rain __________ bearing winds by surrounding mountain ranges.

Penguins, the most highly specialized of all aquatic birds, may live _____ twenty years

He gave _________

Iron _________ for weapons and tools in the Bronze Age following the Stone Age.

Lunar eclipses occur each time the Earth blocks the Sun's light from the Moon _________ the Moon's full phase.

_________ a bridge builder, Gustav Eiffel designed the Eiffel Tower for the Paris Exposition of 1889.

The seed heads of teasel plants raise the nap on coarse tweed cloth __________ than do the machine tools invented to replace them.

The student managed to pass the entrance examination __________ he was blind.

Some procedures used for laboratory analysis of archaeological specimens are _______ procedures conducted in crime laboratories

A good team _______ of both recruiting and coaching as well as performing.

A communications satellite orbits the earth at the same rate that the earth revolves ________ over a fixed point on the surface.

From 1926 until her death, Margaret Mead ________ New York's American Museum of Natural History.

Gilbert Stuart is considered by most art critics _________ greatest portrait painter in the North American colonies

________ the jaguar used to roam freely in the southwestern United States.

The teacher suggested that her students ______ experiences with ESP.

On the slope of Long's Peak in Colorado _________ the ruin of a gigantic tree.

Floride has not yet ratified the Equal Rights Amendment, and _________

_________ as the most important crop in Hawaii is sugar cane

Benjamin West contributed a great deal to American art: __________