knowledge 是不可数名词,只能用表示单数的代词指代.人称代词用 it 指代,指示代词用 that指代,不定代词可以用 one 指代. 例如：He has a wide knowledge of natural history and it has been obtained fro...
knowledge 用不定代词代替时用it还是they
knowledge 是不可数名词,只能用表示单数的代词指代.人称代词用 it 指代,指示代词用 that指代,不定代词可以用 one 指代. 例如：He has a wide knowledge of natural history and it has been obtained fro...