问题描述：
The boy didn't go to bed until his mother came back同义句转换
1.___ ___ his mother came back ____ the
boy____to bed.
2.___ ___ ___ ___his mother came back ____ the boy ____to bed.
是倒装句
1.___ ___ his mother came back ____ the
boy____to bed.
2.___ ___ ___ ___his mother came back ____ the boy ____to bed.
是倒装句
问题解答：
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