题目内容
根据括号内的汉语提示用含it的内容补全下面句子(每空一词) 。
6. Someone must have been there. But we have no idea (是谁) .
6. who it was
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题目内容
根据括号内的汉语提示用含it的内容补全下面句子(每空一词) 。
6. Someone must have been there. But we have no idea (是谁) .
6. who it was