题目内容
【题目】The policemen are investigating the case by enquiring some witnesses.
The policemen are ___ ___ ___ about the case by enquiring some witnesses.
【答案】见解析
【解析】making an investigation
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题目内容
【题目】The policemen are investigating the case by enquiring some witnesses.
The policemen are ___ ___ ___ about the case by enquiring some witnesses.
【答案】见解析
【解析】making an investigation