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I don't think ___ of my friends has seen them.A some B any c

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I don't think ___ of my friends has seen them.A some B any c none D every 请问选哪个?
B
否定,用any
再问: c为什么不对?
再答: every 的话要加 one,因为every只能是形容词 不能说 every of my friend 要说 every one of my friend
再问: c 呢?
再答: none是否定的,只用在肯定句中,如: None of them know me. 他们都不认识我。 None of them don't know me. 为错误, 要说成:Each of them knows me. 句子中 I don't think 是否定,不这样用的 如有帮助,请采纳,谢谢。