Long time ago,people usually lived in bungalow.With the development of society,more and more builldings spring up. Thus,many people move into buildings.很早以前，人们通常都住在平房里面。随着社会的发展，很多楼房平地而起。这样，很多人搬进了楼房。Nowadays,in buildings,there is estate management which can provide a lot convenience for you.And ,the environmental cleaness is do...
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