用be动词的适当形式填空。
1. Lily __________short then. Now she __________tall.
2. —__________your teacher fat?
—No, he isn't. He __________fat then.
3. —__________they at home then?
—Yes, they__________.
4. —__________the dog thin now?
—Yes, it__________.
5. I __________four then. Now I __________nine.