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
正确答案：B
答案为B根据第二段最后两句看WHOpublishedtheimportantnewsalongsidereportsofasimilaroutbreakinHongKongwhereabout15-20%ofthepopulationhadbecomeill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WHO提交样本
