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These viruses, if ________ in, can result in illness or even death.
A.breathingB.breathedC.breatheD.to breathe
B

试题分析:考查状语从句的省略式,英语中如果主从句的主语一致,可以省略从句的主语和be动词,if breathed in="if" these viruses are breathed,句意:如果被吸入,这些病毒会导致疾病或死亡。选B。
点评:做这种题目可以用还原法做题,先把主语和be动词加上,再判断是主动还是被动。句意通顺才行。
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