It is true that Zi Bo is a developed city, but many places have lately been ___

题干

It is true that Zi Bo is a developed city, but many places have lately been _________.

A．pollute	B．pollution
C．polluted	D．position

上一题下一题 0.64难度单项选择更新时间:2014-08-27 04:35:59

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