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UNIT 3THE ENVIRONMENT AND USLESSON 17Lets learn Water There is salt water and fresh water on the Earth.Salt water is water from seas or oceans.Fresh water is water from rivers and lakes.We can only use fresh water, but there is not much fresh water on the Earth.Water is important. People, animals and plants need water to grow.Sadly, people waste a lot of water.They waste water when they keep water running.They waste water when they water plants.People make water dirty, too.They make water dirty when they throw trash into rivers and lakes.What do you learn from this story?Talk with your friends.Game Time!记忆大比拼!记忆大比拼!老师将单词卡片按照随意老师将单词卡片按照随意顺序摆好,学生记忆,顺序摆好,学生记忆,之后老师随意打之后老师随意打乱顺序,学生根乱顺序,学生根据记忆将单词还原。据记忆将单词还原。Homework1.Remember these new words.2.Read the dialogue to your parents. Thank You!
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