3. 1. Her name is Mary. 2. His suitcase is so big! 3. Their knowledge is poor. 4. Its tail is long. 5. His advice is useful. 6. Their dream is to become prosecutors.
4. 1. These are our application forms.
2. Those are my cases.
3. Those are criminals.
4. These are our teachers.
5. Those are departments of the Procurator's Office.
6. Are those new banks?
7. Are these investigators?