21. You don’t need to be ______ Bill Gates to be successful. As long as you can help someone and inspire him to make a difference, you are ____ success.
A. the, the B. a, a C.a, 不填 D. 不填, a
22. ---Mum, have you seen my U-Disk?
---____________ you bought last Sunday? I'm afraid I haven't seen ________.
A. The one; one B. That; one C. One; it D. The one; it
