根据提示填空（每空一词）
The singer became famous when she was twenty-three yearsold.(同义句转换)
The singer became famous____ ____ ____ of 23.
答案
at,the,age
知识点：介词短语
本题需要用“…of 23”来替换原句中的“when she was twenty-three years old(当她23岁的时候)”，短语at the age of…表示“在……年纪时”，所以答案是at the age。
略
WORD格式（
