It's a wonderful place to live 与we won't have enough room to

当中心词为place时,后面的不定式短语中的介词in可省略:
We have no place to live (in).
There is no place for us to live (in).
Zoos are terrible place for animals to live (in).
若中心词是其它名词,介词不能省略：
There is only one room (for us) to live in.
That （house） is too dirty (for us) to live in.