摘要：-Why was he fined? -He happened to flowers in the park. A.be seen step on B.be seen picking C.be caught to pull D.catch damaging 解析:本题考查动词辨析以及非谓语动词的语态.根据句子的意思分析.此处应该使用被动.A项的step on作be seen的宾补时.不能用原形,C项的结构应该为be caught doing sth.. 答案:B

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