Which of the following statements is NOT true of the exhaust system
A. It regulates the speed of a car.
B. It channels out the waste products of combustion.
C. It reduces the noises generated by the engine.
D. It cleans up the emissions harmful to the environment.
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In densely populated suburban areas, a danger exits from ______.
A. streams that do not flow directly to open bodies of water
B. cesspools and septic tanks that contaminate water supplies
C. storm and waste disposal sewers that have been combined
D. the undesirable odors of sewage
Which of the following words could best replace the word "soaring" in the first sentence.*
A. climbing
B. rising
C. flying
D. crawling
People used to think that the earth was flat, ______
A. don't they
B. wasn't it
C. didn't they
D. usedn't it
Ellis and her sisters could hardly recognize the value of that family heirloom, ______
A. couldn't they
B. couldn't she
C. could they
D. could she
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