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完成句子-句型转换 适中0.65 引用1 组卷50
It happened that you had known each other before. (用动词不定式to do改写)
You happened ________ each other before.
21-22高二下·全国·课时练习
知识点:know不定式的完成式:to have done 答案解析 【答案】很抱歉,登录后才可免费查看答案和解析!