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).