Dolly made her first public appearance at age 16. She was warmly

Dolly made her first public appearance at age 16. She was warmly welcomed and became a local star, (complex sentence)
【正确答案】：When Dolly made for you first public appearance at age 16,She was warmly welcomed and became a local star.
【题目解析】：本句的要求是将两个单句变成一个复合句（complex sentence）。我们可以将其变成一个状语从句When Dolly made her first public appearance at age 16（当Dolly16岁首次公开亮相的时候）。