题目内容：
Which statement is not true according tO the passage?
A．[ A ] health officials are increasing surveillance measures at doctors' office B．[ B ] So far, the cases of swine flu in the United States are not very seriou
C．[ C ] officials are determined to take more aggressive actions against swine fl
D．[ D ] Besser says,the number of infections will probably ris
参考答案：
答案解析：