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5. David can play the violin. (對(duì)畫(huà)線(xiàn)部分提問(wèn) ) 6. I like the pigs. (改為一般疑問(wèn)句,并作否定回答 ) 7. There’ s a pencil box on the desk. (改為復(fù)數(shù) ) 8. Read the numbers, please. (改為否定句 ) 9. Are they American girls? (改為單數(shù) ) 10. The boy can make a model boat. (對(duì)畫(huà)線(xiàn)部分提問(wèn) ) 11. He likes playing the guitar. (改為否定句 )