题目内容
10．必须采取措施来防止饮用水受污染．Something mustbe done to protect/keep/prevent the drinking waterfrom being polluted．
分析 be done to protect/keep/prevent the drinking water
解答 答案：be done to protect/keep/prevent the drinking water．
首先通过中英文句子的比对，可知英文句子中缺少"采取"和"防止饮用水…"的表达．结合主语是Something判断用被动语态，且有情态动词must，说明本题考查含有情态动词的被动语态，其构成是：主语+情态动词+be+动词的过去分词．；短语"防止…做某事"的英文表达是：protect/keep/prevent…from doing sth．，"饮用水"是the drinking water，故答案为：be done to protect/keep/prevent the drinking water
点评 做这类题型，首先根据所给汉语明确句子所要考查的单词或短语的拼写，再结合相关语法知识对单词或短语做出形式上的变化．
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