Choose the right words in brackets to complete the sentences. (Our/ours) teacher is very kind. Whose budgie is this?

Our teacher is very kind. Whose budgie is this? – It is mine. In spring her friends often go to the forest. Their address is on the table. Your money is in the bank. The yellow bag is mine, the red one is hers. Is it Susan’s collection? – No, it is not hers. Bill knows your address, but he doesn’t know theirs. We live in this city. It is our city. They are my pets.