Choose the best answer

XII. Choose the best answer.
76.They were surprised……………the news.
A. for                                 B. with                               C.at                               D. on
77.I am interested ……walking among green trees.
A. on                                  B.in                                     C. with                         D. of
78.Most of the students in my class are fond ………….listening to music.
A.of                                   B. about                               C. to                             D.for
79. She is bored ……getting up early in the winter morning.
A.with                               B.of                                      C. in                             D. to
80.My brother is keen ………..learning English.
A. on                                 B. in                                      C.at                              D. for