W.H.O. reported the influenza because ______.
A、the doctor belonged to that organization
B、many people in Hong Kong also suffered from it
C、the doctor found its virus and sent the samples to them
D、it spread widely in Singapore for the first time
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试题解析
答案为 B。根据第二段最后两句看,W.H.O. published the important news alongside reports of a similar outbreak in Hong Kong,where about 15-20% of the population had become ill 作出该项选择。选项 A和D 在文中未提到;选项 C文中未提他向W.H.O.提交样本。