It is important that the TOEFL Office ______ an applicant's registration.

Deserts are often formed ______ they are cut off from rain-bearing winds by the surrounding mountain ranges.

______ that the English settled in Jamestown.

Staying in a hotel costs ______ renting a room in a dormitory for a week.

When friends insist on ______ expensive gifts, it makes most Americans uncomfortable.

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

As a safety measure, the detonator for a nuclear device may be made of ______, each of which is controlled by a different employee.

An equilateral triangle is a triangle ______ and three angles of equal size.

______ are found on the surface of the moon.

______ two waves pass a given point simultaneously, they will have no effect on each other's subsequent motion.

A child in the first grade tends to be ______ all of the other children in the class.

The bird's egg is such an efficient structure for protecting the embryo inside ______ difficult for the hatchling to break

We had hopped ______ the game, but the other team played very well.

The artistic medium of clay is ______ that images have been found near the remains of fires from the last Ice Age.

Unlike most Europeans, many Americans ______ a bowl of cereal for breakfast every day.

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The Pickerel Frog, native to Southern Canada and the Eastern United States, should be avoided because their skin secretions are lethal to small animals and irritating to humans.

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The most common form of treatment it is mass inoculation and chlorination of water sources.

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People with exceptionally high intelligence quotients may not be the best employees since they become bored of their work unless the job is constantly changing.

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Neither the mathematics department nor the biology department at State University requires that the students must write a thesis in order to graduate with a master's degree.

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The oxygen content of Mars is not sufficient enough to support life as we know it.

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Students in the United States often support themselves by babysitting, working in restaurants, or they drive taxicabs.

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Those of us who have a family history of heart disease should make yearly appointments with their doctors.

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Although federal support for basic research programs are much less than it was ten years ago, more funds are now available from the National Science Foundation.

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Living in New York, apartments cost more to rent than they do in other, smaller cities.

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This new model not only saves time but also energy by operating on two batteries instead of four.

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The government requires that a census be taken every ten years so accurate statistics may be compiled.

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In 1975, according to the National Center for Health Statistics, the average life expectancy for people born during that year is 72.4 years.

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Traditionally, the flag is risen in the morning and taken down at night.

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When the silkworm gets throught to lay its eggs, it dies.

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Frank Lloyd Wright has been acclaimed by colleagues as the greater of all modern architects.

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Scientists had previously estimated that the Grand Canyon in Arizona is ten million years old; but now, by using a more modern dating method, they agree that the age is closer to six million years.

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The corals can be divided into three groups, two of which is extinct.

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Without alphabetical order, dictionaries would be impossibility to use.

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Jane Addams had already established Hull House in Chicago and began her work in the Women's Suffrage Movement when she was awarded the Nobel prize for peace.

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The extent to which an individual is a product of either heredity or environment cannot proven, but several theories have been proposed.

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Although jogging is a good way to lose weight and improve one's physical condition, most doctors recommend that the potential jogger begin in a correct manner by getting a complete checkup.

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The flag of the original first colonies may or may not have been made by Betsy Ross during the Revolution.

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Some conifers, that is, tree that have cones, are able to thrive on poor, thin soil.

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The Indians of the southwestern United States are famous for their beautiful art work, especially handmade jewelry cast from silver, carved from stones, or decorations with beads and feathers.

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Because the solar tiles were very secure fastened, only a few became detached when the Space Shuttle reentered the earth's atmosphere.