Find the mistakes in the story.

There were once a old house. In a house there was much mouses. There was also the cat in a house. The cat killed many mice every day. The mouses did not knew what to does. So one days, they all come together and begin talk about cat.
- What can we do? - they said. - That cat shall kill our all.
- I know what to do - said - one little mouses. - The cat catch we because we do not hear her. Put a bell round their neck and than we shall hear her before she come into the room.
- That is a very good idea - said all the mouses. - Now the bed cat will not catch our.
They were all very glad till one clever old mice asked them this question:
- Who will puts the bell on the cat?