people who是has been还是have been
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people who是has been还是have been
people who是has been还是have been
people who是has been还是have been
people是集体名词,单数形式表复数概念,所以应该用have been
复数名词,have been
people who是has been还是have been
people who是has been还是have been
people who是has been还是have been
people是集体名词,单数形式表复数概念,所以应该用have been
复数名词,have been