问题
选择题
—I do believe the scientific explanation that when a tomb is opened, the fresh air disturbs the viruses inside it. What about you?
—So do I. If _______ in, the disturbed viruses may cause illness or even death.
A．breathing
B．breathed
C．being breathed
D．to breathe
答案
答案：B
考查条件状语从句的省略。当状语从句的主语和主句主语一致，并含有be动词时，从句的主语和be动词可以省略。If _______ in, the disturbed viruses may cause illness or even death.补充完整应是：if the disturbed viruses are breathed in, the disturbed viruses may cause illness or even death.所以选B。