Rubbish,such as plastic bags and boxes.''white pollution '' ,is becoming a serious problemA known as B is knownas

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Rubbish,suchasplasticbagsandboxes.''''whitepollution'''',isbecomingaseriousproblemAknownasBisknownasRubb

Rubbish,such as plastic bags and boxes.''white pollution '' ,is becoming a serious problemA known as B is knownas
Rubbish,such as plastic bags and boxes.''white pollution '' ,is becoming a serious problem
A known as B is knownas

Rubbish,such as plastic bags and boxes.''white pollution '' ,is becoming a serious problemA known as B is knownas
A known as
主语是rubbish 谓语是 is becoming
两个逗号之间的部分是插入语,形容rubbish.
插入语可以是分词结构或从句结构.
这里没有从句的迹象,应该用分词结构
所以选A