I visited museums and sat in public gardens.句中sat in public

I visited museums and sat in public gardens.句中sat in public visited museums and sat in public gardens I visited museums and sat in public i visited the museums and sat in public gardens 上句中为何museum和 专有名词加si visited museums and sat in public gardens 为什么museum i visited museums and sat in public gardens 书本这句话是我参观了博物馆 还去 I visited museum and sat in public gardens.这句话里面为什么要加sat呢? i sat in a public gardens 为什么用sat in 公园为什么加s? 新概念英语第二册第三课中有in public gardens这个短语,在这个短语中为什么gardens是复数 in public in public=in the public places? in public 还是in the public