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threat than all other drugs combined, including alcohol. For example, though lung cancer
is not a common disease, almost all lung cancers occur in smokers. Smoking is also
estimated to be related to about 30% of all other types of cancer, to about 30% of deaths
resulting from heart disease, and 80-90% of deaths from chronic obstructive lung disease.
28- The passage states that
A)there has always been abundant evidence that smoking causes cancer
B) almost all smokers develop lung cancer
C) lung cancer was not very common among smokers until 1950s
D) smokers tend to use all 6ther drugs, including alcohol
E) it took a long time for people to believe that smoking was dangerous
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