听力原文：Which group of people is identified by the research as the most cold-ridden group？
(31)
A. Old people.
B. Teenagers.
C. Infants.
D. Adults.
查看答案
【B6】
As
B. In
C. On
D. At
The author's primary purpose in writing this passage is to______.
A. warn people of the harm of H. pylori colonization of the stomach
B. make people aware of the harm of eradicating H. pylori from the stomach
C. suggest that the benefits of eradicating H. pylori from the stomach are not outweighed by the potential harm
D. call attention to the consequences of eradicating H. pylori from the stomach
【C13】
A. eventually
B. accidentally
C. surprisingly
D. fortunately
Which of the following would most probably follow the last sentence of this passage？
A. Furthermore, the disappearance of H. pylori may be a sentinel indicating the possibility of other microbial extinctions as well.
B. The possibility that this bacterium may actually protect people against disease of the esophagus has significant implications.
C. However, there has been an unexpected rise in the incidence of a new class of diseases involving the esophagus.
D. The rise of these diseases has occurred just as H. pylori has been disappearing, and it is tempting to associate the two phenomena.
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