In the passage how many cancers are mentioned in
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In the passage how many cancers are mentioned in relation to smoking cigars daily?
A. Six.
B. Seven.
C. Eight.
D. Nine.
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答案：B
第一段中提到lip , tongue , mouth , throat四种，第二段中提到lung, esophagus, larynx 三种，共七种，第三段中的oral是对lip , tongue , mouth等的统称，不应再算做一种。