1. Grace not only likes helping people, but she also likes taking care of little animals.
2. Grace not only likes helping people, but she likes taking care of little animals.
3. Grace not only likes helping people, but also likes taking care of little animals.
4. Grace not only likes helping people, but ikes taking care of little animals.
5. Grace likes not only helping people, but also taking care of little animals.
6. Grace likes not only helping people, but taking care of little animals.
Which of the above sentences is NOT acceptable?