题目内容
As we all know, many travellers visit the Great Wall every year.(改为被动语态)
As we all know, the Great Wall _________ _________ by many travellers every year.
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题目内容
As we all know, many travellers visit the Great Wall every year.(改为被动语态)
As we all know, the Great Wall _________ _________ by many travellers every year.