Bacteria Alived in the soil play Ba vital role in Crecycling the carbon and nitrogen Dneeded by plants.

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问题 Bacteria Alived in the soil play Ba vital role in Crecycling the carbon and nitrogen Dneeded by plants.

选项 A、 
B、 
C、 
D、 

答案A

解析 lived in改为living in。分词作后置定语修饰Bacteria,由于live的动作时细菌自己发出的,为主动形式故用主动形式,所以为living。
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