2.Who played the most important role in Maria's great achievement?
A.King FrederickⅥ
B Francesco de Vico
C. Her father
D. Her mother
3.What problem did Maria meet with in winning the prize?
A She named the comet on her own
B.She did not use the required telescope.
C.She did not report her discovery in time
D.She discovered the comet with her father
4.When did Franecseo de Vico discover the comet?
A. In l8l8
B. In l889
C. In 1848
D. In l847