Narcissa Sun came to the United States at 18 to study at the University of Illinois. Now, the 21-year-old finished her third year at the university and has been working part-time at the campus library. Her job is mending old books. "I really enjoy repairing old books, especially those that were heavily damaged." Sun said.

How old is the girl now?

A. 21-year-old

B. 22-year-old

C. 18-year-old

（中國日報網(wǎng)英語點津 Helen 編輯）