题目内容:
AccordingtoFederalhealthofficials,thefactthatmoreWestNilecaseshavebeenreportedindicateslthat
A.morestatesareaffected B.theaverageagedroppeddrastically
C.healthofficialsaremorealerttothedisease
D.theepidemicseasonbeganamonthearlier
参考答案:
答案解析: