题目内容
15.Waste paper shouldn't ________ everywhere.It's our duty to keep our city clean.( )| A. | throw | B. | be thrown | C. | is thrown | D. | are thrown |
分析 不应该到处扔废纸.保持城市清洁是我们的责任.
解答 答案:B 根据Waste paper shouldn't ________ everywhere.可知Waste paper是主语,是动作的承受者,和动词throw构成被动关系,应该用被动语态.should是情态动词,情态动词的被动语态的构成:情态动词+be+及物动词的过去分词,故选:B.
点评 主要考查被动语态,当句子的主语是动作的承受者时,应该用被动语态,本题考查的是情态动词的被动语态.
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