选出意思与画线部分相同的选项 He was ill, so he couldn't e.A.thereforeB.and thereforeC.butD.although
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B解析so作为连词连接结果状语从句，相当于and therefore，故B项正确。therefore是副词，可以承上启下地连接两个句子，其前常用分号或与and连用。如：He was ill；therefore he didn't e. /He was ill and therefore he did not e. (他病了，所以没来。)