题目内容
7.Food safety is important.Rules ______ to stop people from food pollution.( )A. | must make | B. | must be made | C. | can't make | D. | can't be made |
分析 食品安全很重要.必须制定法规让人们免受食品污染.
解答 答案:B【解析】含有情态动词的被动语态的用法.结合语境并根据关键句Food safety is important,并结合常识,既然食品安全这么重要是关乎人民生命的大事,所以一定要制定法规保证其安全,所以要用情态动词must表一定,必须;再根据后面句子的主语Rules(规则)是由物充当的,是动词make的动作承受着,所以该句应该用含有情态动词must的被动语态去完成;根据此类被动语态的构成:情态动词+be+动词的过去分词,所以应表达为must be made.结合选项,故选B.
点评 此题考查情态动词和被动语态的综合运用.做题时先要联系语境抓住句意的基础上结合情态动词的意义确定要使用的情态动词;再根据主语和谓语的关系确定出使用的语态;两者结合再根据相关的语法知识就能顺利做出答案.
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