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19. The subject matter of this passage is
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20. The organization of paragraph 2 is
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21. According to the passage, who believes that our present medicines may only work for 10 or 20 more years?
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22. The author of this article states that many of our current diseases are difficult to treat. Which of the following best expresses the writer's reason for making this statement?
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23. Using the logic outlined by the writer in this passage, one would expect that if people stop taking their prescribed antibiotics when they begin feeling better then
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24. The author's purpose in writing this passage is to
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25. According to this passage, the phrase antibiotic regimen is used to mean
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