— What _______ if you _______ on the Titanic? 　　

— What a question! 　　[ ]

A. would you do; were　　　　　　　　　　

B. did you do; were 　　

C. had you done; would have been　　　　　

D. would you have done; had been

只通过飞沫传播的呼吸道传染病有

A．百日咳

B．流行性腮腺炎

C．猩红热

D．水痘

E．麻疹