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按括内要求写出下列单词的相应形式。
1.wash(第三人称单数形式)_________  2.possible(反义词)_______

3.radio(复数)________               4.buy(过去时)________  

5.begin(现在分词)_______


1.washes 2.impossible 3.radios4. bought 5.beginning

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