用所给词的适当形式填空，每空一词。
1. A cow has four _______ (stomach).
2. Mr Black is very clean. He brushes his _______ (tooth) three times a day.
3. The boy washes his _______ (foot) once a week. He is very dirty.
4. The woman held (抱) her baby in her _ (arm).
5. Pigs have big _______ (ear).
6. We see with our _______ (eye).
7. She is very clean. She washes her_______ (tooth) every evening.
8. Boys, close your _______ (mouth) and listen to the teacher.
9. If you have any questions, please put up your _______ (hand).
