蝇传播肠道传染病属（）
A.机械性传播
B.发育式
C.繁殖式
D.发育繁殖式
E.经卵传递
参考答案：A
----Mary broke up with me!
----You ______ have forgotten about the Valentine's Day．
A．shouldn't
B．couldn't
C．needn't
D．mustn't
