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句型转换
The firemen stopped working when all the workers were saved．(保持句意基本不变)
The firemen ________ stop working ________ all the workers were saved．
答案：didn’t,until
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题目内容
句型转换
The firemen stopped working when all the workers were saved．(保持句意基本不变)
The firemen ________ stop working ________ all the workers were saved．