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II. Read the following passages and identify the topic sentence in each by underlining it.
阅读以下每段文章,然后在每段文章的主题句下划线.
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Students read the passage and find out the topic sentence or main idea.
在这一过程中使得学生对于文章有大体了解,为下一步仔细阅读和写作做准备.
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Topic sentence 3 : Water pollution is caused by waste from factories and cities.
主题句 3: 水污染来自于工厂和城市的废弃物.
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Step 1 : Read the passage quickly and find out the topic sentence of each paragraph.
找主题句有助于学生大体把握文章的行文脉络.
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Ask the Ss to read the passage quickly and find the topic sentence of the passage.
培养学生快速把握主题句的能力,从而使学生对文章内容和主旨大意的整体把握.
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