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				-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:本題考查動(dòng)詞辨析以及非謂語動(dòng)詞的語態(tài).根據(jù)句子的意思分析.此處應(yīng)該使用被動(dòng).A項(xiàng)的step on作be seen的賓補(bǔ)時(shí).不能用原形,C項(xiàng)的結(jié)構(gòu)應(yīng)該為be caught doing sth..  答案:B			【查看更多】
			


		
           
          


		
          
		
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          —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
              
           
          

			
          
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