The bark of some species of oak trees yields a substance used in ____ leather

The hibernation takes place only among ____ animals

Most beekeepers have observed ______ at the approach of a thunderstorm.

______ spotted owl is in danger of soon becoming extinct

In 1938, when Benny Goodman's orchestra presented a concert at the prestigious Carnegie Hall, _______ was clear that jazz had at last been fully accepted.

The rabbit scurried away in fright _______

Some monkeys, _______ use their tails in a way similar to a hand.

Children usually turn to their parents rather than ________ for protection from threats in the environment.

After _____ in his application form, he went to pay the membership fee.

Duke Ellington was a composer, conductor, and pianist ________ ranked as one of the greatest of all jazz figures.

Some of the rainwater from clouds evaporates before ________.

The janitor refused to unlock the classroom door because he ______ busy.

John Dewey advocated teaching methods that provided teaching experiences for students to participate in _______ material to memorize.

John walked by the professor's office _______ would be in.

Neither Jane nor her brothers ________ a consent form for tomorrow's field trip.

Ina hot, sunny climate, man acclimatizes by eating less, drinking more liquids, wearing lighter clothing, and __________

The javelin used in competition must be between 260 and 270 centimeters __________.

_________ jellies, jams are made by retaining the pulp with the fruit juice.

______ are prepared from flour or meal derived from some form of grain.

It is possible ________ may assist some trees in saving water in the winter.

______ the Gulf Stream is warmer than the ocean water surrounding it

______ that new information to anyone else but the sergeant

In the seventeenth century, North America was vast and unconquered ______ only at great cost

If the United States had not entered the Second World War, probably the 1940 unemployment rate of 14% ________ still further.

________ created the donkey and elephant that symbolize the Democratic and Republican parties.

The more hemoglobin one has, the more oxygen is carried to _______ cells.

Before the Angles and the Saxons __________ to England, the lberians had lived there.

_________ more susceptible to bacterial contamination than other types of meat because it has more surface area exposed to bacterial laden air.

_____ about individuals who really existed and things that actually happened.

Henry Ford revolutionized production management by ________ into small steps on a moving line.