赞题库-背景图
单项选择题

A.WHO said all of the members contracted the bird fluB.……

In the case of a family in Vietnam, ______.


A.WHO said all of the members contracted the bird flu
B.experts think it's possibly caused by the spread of bird flu
C.three of them fell ill due to a serious unidentified disease
D.the sisters caught a disease after tests were done on them