问题标题:
【问:Heistheonlyperson______knowsFrenchinourclass.是填that还是who?Heistheonlyoneofthestaff_______knowsFrench.是填that还是who?,是不是先行词是one,只用who?】
问题描述:

问:Heistheonlyperson______knowsFrenchinourclass.是填that还是who?

Heistheonlyoneofthestaff_______knowsFrench.是填that还是who?,是不是先行词是one,只用who?

李登业回答:
  是的,只能填who,
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