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

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

Electron storage rings _______ in investigations of the structure of materials.

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

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

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

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

______ spotted owl is in danger of soon becoming extinct

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

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

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

The hibernation takes place only among ____ animals

______ the intermission, the kids all bought popcorn.

Some of the rainwater from clouds evaporates before ________.

______ that new information to anyone else but the sergeant

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 __________

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

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

The rabbit scurried away in fright _______

________ he would have been able to pass the exam

Rhododendrons would rather _____ in shady places, and so would azaleas.

The committee has met and ________

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

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

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

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

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

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