问题描述：
Last Sunday,we heard them sing Beijing Opera in the theatre.
改为被动语态(填空)
They ____ ____ ____ ____ Beijing Opera in the thetre last Sunday.(4个空填四单词)
改为被动语态(填空)
They ____ ____ ____ ____ Beijing Opera in the thetre last Sunday.(4个空填四单词)
问题解答：
我来补答展开全文阅读