作业帮David finally solved that problem with the help of his father 补全句子David finally _ _ solving that problem with the help of his father
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David finally solved that problem with the help of his father 补全句子David finally _ _ solving that problem with the help of his father
David finally solved that problem with the help of his father 补全句子
David finally _ _ solving that problem with the help of his father
David finally solved that problem with the help of his father 补全句子David finally _ _ solving that problem with the help of his father
succeeded on
successfully
succeeded