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david is the person whom/who i have known for a long time.应该用whom or who?还有其他语法错误吗?

分类: 作业答案 • 2022-03-10 10:18:53

问题描述：

david is the person whom/who i have known for a long time.应该用whom or who?还有其他语法错误吗?

答

who,i have known 不缺成分.