单项选择题

It can be guessed that the author is most probably a ______.

A．naturalist
B．doctor
C．journalist
D．hotel manager
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单项选择题
According to the passage, neurotoxin can cause ______.
A．paralysis of its host
B．red tide
C．respiratory problems for seafood eaters
D．death of bivalves like clams, oysters, and mussels
单项选择题
The length of Cape Cod is ______.
A．399 miles
B．a mile
C．40 miles
D．65 miles
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