________againandagaininsimplewords

发布时间：2020-07-26 02:25:32

________ again and again in simple words, the problem seems easier for the child to understand.A.ExplainedB.To be explainedC.Having explainedD.Explaining

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A解析导解：“一次次解释后”，用过去分词做伴随状语．
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