中国流行古筝曲:句型转换

来源：百度文库 编辑：高考问答 时间：2024/04/30 03:18:41
Bill could swim when he was only four.
Bill ___ ___ ___ swim at the age of four.

was able to

was able to

句型转换 句型转换. 句型转换 句型转换 句型转换 句型转换 句型转换！！！ 句型转换 句型转换: 句型转换