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题型：判断题 题类：常考题 难易度：普通
沪教版（三年级起点）英语六年级上册Module4 Unit12Earth同步练习
— Are the blue parts oceans?
—{#blank#}1{#/blank#} .(做肯定回答)
{#blank#}1{#/blank#}改为{#blank#}2{#/blank#}
Let's protect the Earth and the environment．People need to breath the fresh air．What should we do? These are the things we must do
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