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It's known to all that reading -----one's knowledgeA.is increasing B.increases C.has increased D.increased

题目详情
It's known to all that reading -----one's knowledge
A.is increasing B.increases C.has increased D.increased
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答案和解析
选B,因为这是一个主语从句在主语从句中reading作主语,句子表示的是一般的状态,所以用一般现在时,动词用第三人称单数形式