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。

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