Next, John Snow looked into the source of the water for these two streets. He found that ⑦________ came from the river ⑧________(pollute) by the dirty water from London. ⑨________ immediately told the astonished people in Broad Street to remove the handle from the pump so that it could not be used. Soon afterwards the disease slowed down. He had shown that cholera ⑩________(spread) by germs and not in a cloud of gas. 答案：①where　②a　③deaths　④further　⑤from　⑥to blame　⑦it　⑧polluted　⑨He　⑩was spread 考点探究演练 1.attend vt. 出席；参加；照顾；护理 归纳拓展 attend school/church/a lecture/a meeting/a wedding/a party上学/去教堂/听演讲/出席会议/出席婚礼/参加晚会 attend to sb.照顾/护理某人；接待某人 attend to sth.(＝see to sth.＝deal with sth.)处理某事

　　③I can't go out with you tonight because I have an urgent thing ________ ________ ________. 今晚我不能与你一起外出，因为我有一件急事要处理。 答案：①to attend a summer school　②attended on/upon/to　③to attend to

　　2．expose vt. 揭露；暴露；使遭受；使曝光 归纳拓展 expose sth.揭露……；揭发…… expose sb./sth. to ...使某人体验……/某物暴露于…… be exposed to ... 接触到……；被暴露于……

　　③It is generally believed that ________ ________(expose) to radiation is rather dangerous. 普遍认为暴露在辐射环境里会很危险。 答案：①to　②is exposed　③being exposed

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