1. —What is Tom busy doing tonight?
—He is making p________ for tomorrow's examination.
2. He was so generous that he d_______a lot of money to the flooded area.
3. In China, David Holmes d_______ an interest in teaching English to Chinese students.
4. I _________(后悔) not finishing my homework yesterday.
5. The _________(平均的) age in our class is 17.
