一道很难的该错题.

【I hope to become a pianist, but I turned teacher】
【理由】Turn teacher =become a teacher，英语里没有turn a teacher。

前后的时态要一致，hope应该用过去式hoped。

become pianist, 没有a， become的固定用法。

I hope to would become a pianist,but I turned a teacher.

我梦想成为钢琴家 , 但我成为了一个老师

加 would 表示想实现 没能实现