谁知道下面英语阅读理解的答案?
问题描述：
谁知道下面英语阅读理解的答案?
There has not been a world-wide outbreak of influenza since 1968.Expert say there should have been another by now.
题；The best title of the passage is_____.
A.The vaccines against bird flu B.Preparing for the next flu pandamic
为什么？
原文在哪？
答
B 找不到,根据最后一句话啊,普通常识.