把下列句子转换为现在完成进行时He began to make model planes when he was sevenHe _______________________________________________________
2022-03-26 23:19:14 34次 反馈错误 加入收藏 正确率 : 100%
题目内容：
把下列句子转换为现在完成进行时
He began to make model planes when he was seven
He _______________________________________________________
本题链接：
