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听录音，给下列图片排序。
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1. 3 2. 1 3. 4 4. 2
读一读，选择正确的选项补全对话。
A. What can we do to keep the river clean? B. Why was it so dirty before?
C. Wow! The water is so clear and beautiful! D. Great ideas! Let's tell others about them.
Ms. Green: Hi, everyone! Look, this is Green River.
Lisa: 1.
Ms. Green: Yes, it is very clean now. But a few years ago, it was different.
Mike: 2.
Ms. Green: Because there was a lot of waste — cans, plastic bottles and old glass in the water.
Lisa: That's terrible. 3.
Mike: We can recycle glass and cans. And we can reuse paper bags.
Lisa: And we should never throw waste into the river.
Ms. Green: 4.
A. What can we do to keep the river clean? B. Why was it so dirty before?
C. Wow! The water is so clear and beautiful! D. Great ideas! Let's tell others about them.
Ms. Green: Hi, everyone! Look, this is Green River.
Lisa: 1.
C
Ms. Green: Yes, it is very clean now. But a few years ago, it was different.
Mike: 2.
B
Ms. Green: Because there was a lot of waste — cans, plastic bottles and old glass in the water.
Lisa: That's terrible. 3.
A
Mike: We can recycle glass and cans. And we can reuse paper bags.
Lisa: And we should never throw waste into the river.
Ms. Green: 4.
D
答案
1. C 2. B 3. A 4. D
解析
【分析】先通读对话，明确话题为绿河从脏变干净的原因及保护办法，逐空结合上下文语境匹配选项：第1空需衔接对绿河的评价，对应后文“干净”的描述；第2空需对应下文的原因回答；第3空需对应下文的做法回答；第4空需对应前文提出的办法的回应。
【解析】1. 第1空：上文Ms.Green展示绿河，下文提到“it is very clean now”，需选表达河水清澈的C选项，符合语境；2. 第2空：上文提及几年前不同，下文用because解释原因，需选询问之前脏的原因的B选项，逻辑通顺；3. 第3空：上文说河水脏很糟糕，下文回答具体做法，需选询问保持河水干净办法的A选项，衔接自然；4. 第4空：上文提出保护办法，需选对想法的回应，D选项符合语境。
【答案】1.C 2.B 3.A 4.D
【知识点】情景交际补全对话
【点评】本题围绕“保护河流”的话题考查日常情景对话补全，需结合上下文逻辑选择合适语句，是小学英语基础题型，难度适中。
【难度系数】0.5
【解析】1. 第1空：上文Ms.Green展示绿河，下文提到“it is very clean now”，需选表达河水清澈的C选项，符合语境；2. 第2空：上文提及几年前不同，下文用because解释原因，需选询问之前脏的原因的B选项，逻辑通顺；3. 第3空：上文说河水脏很糟糕，下文回答具体做法，需选询问保持河水干净办法的A选项，衔接自然；4. 第4空：上文提出保护办法，需选对想法的回应，D选项符合语境。
【答案】1.C 2.B 3.A 4.D
【知识点】情景交际补全对话
【点评】本题围绕“保护河流”的话题考查日常情景对话补全，需结合上下文逻辑选择合适语句，是小学英语基础题型，难度适中。
【难度系数】0.5
