单项选择题

Which of the following does not contain caffeine, according to the passage

A．cola drinks
B．tea
C．chocolate and cocoa
D．water
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单项选择题
The main point discussed in this passage is ______.
A．the harmful effects of coffee on people
B．the harmful effects of caffeine on people
C．caffeine used as a viable cure for momentary fatigue
D．excessive ingestion of caffeine by people
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