问题标题:
【18.Doesheoften_______hismother______theroom?A.help,cleansB.help,cleanC.helps,cleaningD.helps,clean】
问题描述:

18.Doesheoften_______hismother______theroom?

A.help,cleansB.help,cleanC.helps,cleaningD.helps,clean

吕鸣回答:
  B.help,clean   一般疑问句中动词要用原形help,helpsb.dosth.用原形clean
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