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求改错,老师把这段标红了,

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求改错,老师把这段标红了,
Customers and local traders’ attitudes to the development of supermarket has,to some extent,investigated and addressed.
求改错,老师把这段标红了,
改成被动语态完成时句子.
Customers and local traders’ attitudes to the development of supermarket has, to some extent, been investigated and addressed.