Alice is a white dog. She is two.Bob is a brown dog. Bob and Alice are good friends. Look at the two dogs. Bob:Good morning! Alice: Good morning! Bob:What's this? Alice: It's a jacket. It's my sister's. Oh, my sister is Grace. Bob:What's that? Alice:It's a book. It's Miss Miller's book. She is an English teacher. Bob:Well,dogs don't like books. Grace is Alice's  _  .
brother teacher sister friend