Помогите пожалуйста дам 30 балов task choose the correct answer 1 is sandra your/yours sister? 2 we have a dog it is our/ours 3 kim is from japan her/hers flat is in tokyo 4 this address isnt their/theirs

1 Is Sandra your sister? 2 We have a dog. It is ours. 3 Kim is from Japan. Her flat is in Tokyo. 4 This address isn't theirs.