题目内容
句型转换.保持意思不变,改写句型.
John went to bed after he finished his homework.
John ________ ________ to bed ________ he finished his homework.
答案:didn't;go;until
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题目内容
句型转换.保持意思不变,改写句型.
John went to bed after he finished his homework.
John ________ ________ to bed ________ he finished his homework.