1.以前居住的是低矮的房子,现在住在高楼里Before the living is low house, now live in a high-rise2.过去用动物帮助种地,现在用机器In the past, and now with farm the land animals help machines3.以前在很旧的教室学习,现在是现代化的学校Before the classroom study in a very old, now is the modern schools 写整篇的话容易穿帮，你还是自己组织下吧。
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