单项选择题

Quite a few New Yorkers took their mayor's recent advice and got a flu shot.

A． Right
B． Wrong
C． Not mentioned
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单项选择题
Asking all healthy adults to get a flu shot may result in a shortage of the flu shots for those who are most vulnerable to the infection.
A． Right
B． Wrong
C． Not mentioned
单项选择题
Those who get the flu vaccine are surely protected from the disease.
A． Right
B． Wrong
C． Not mentioned
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