You _____that mistake; you were too careless. [ ]

A. should not have made

B. should not make

C. ought not have made

D. must not have made

流行性乙型脑炎的传播途径为（）。

A.空气传播 

B.消化道传播 

C.接触传播 

D.虫媒传播 

E.血液传播