题目内容
句型转换
The girl singing upstairs was once trained in Italy．
→The girl _________ _________ _________ _________ was once trained in Italy．
答案：who,was,singing,upstairs
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题目内容
句型转换
The girl singing upstairs was once trained in Italy．
→The girl _________ _________ _________ _________ was once trained in Italy．