题目内容
15.PM 2.5pollution (pollute) has become a serious problem which does harm to our health.分析 PM 2.5污染已成为危害我们健康的严重问题.
解答 答案:pollution 考查单词填空.根据题干:要用名词作主语,pollute是动词,名词是 pollution
点评 解答此题的关键是根据语境推测要填内容表达的含义,然后能理解各选项内容,有时可能没有必要细细区分每个单词的含义,仅根据句子语气就可以判断出正确答案.
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