优优班--学霸训练营 > 题目详情
  •         his homework, my son went downstairs to play basketball. 
    A.Having finishedB.finishedC.to finishD.finishing
    【考点】现在分词的被动式,现在分词,不定式的被动式,过去分词
    【分析】请登陆后查看
    【解答】请登陆后查看
    难度:较易
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