Many years ago ,there were many old city walls in Beijing.(同义句转换)many years ago ,there were many old city walls in beijing同义句转换____ ____ ____ ____ many old city walls in beijing.

问题描述:

Many years ago ,there were many old city walls in Beijing.(同义句转换)
many years ago ,there were many old city walls in beijing同义句转换
____ ____ ____ ____ many old city walls in beijing.

there use to be

long ago ,there were many old city walls in beijing

There used to be
used to表示以前有.

there used to be