The ice is very thin.We can't walk on it.(改写句子,句意不变)

问题描述:

The ice is very thin.We can't walk on it.(改写句子,句意不变)
The ice is ---- ---- ---- ----to walk on.
I saw it happen when I was going to school.(改写句子,句意不变)
---- ---- ---- ---- ----,I saw it happen

too thin for us
on my way to school