用be动词的正确形式填空,速度要快!

用be动词的正确形式填空,速度要快!
用be动词的正确形式填空
1, I（ ）a teacher.
2, Jill and I () doctors.
3, They ( ) scientists.
4, It () a cat.
5, He () a doctor.
6, You and Joe () accountants.
7, She ( ) a nurse.
8, They ( ) doctors.
9, They ( ) flowers.
10, Ellen and I ( ) good friends.
谢谢啦!