As he had already been accustomed to living in the countryside,Jackson refused to
A. used to
B. got used to
C. been fond to
D. preferred
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Which of the following is NOT true about natural selection？
A. Natural selection favors adaptations that help a species to Survive.
B. Natural selection works against extreme changes in a species.
C. Natural selection allows helpful, new traits to spread through a population.
D. Natural selection occurs in periods of severe environmental disturbances.
The word "donate" (Line 2, Paragraph 4) is closest in meaning to____.
A. "give"
B. "send"
C. "take"
D. "move"
Over six million citizens of the United States benefit from private pension plans
A. unauthorized
B. confidential
C. nontransferable
D. non-governmental
Which of the following about saccharin is true？
A. Saccharin was found by chance.
B. After doing many experiments, Walters finally found saccharin.
C. Waiters,noticed that saccharin could be used as a substitute for table sugar.
D. A scientist found saccharin at dinner.
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