Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.( có giải thích)
5.  Mrs Adams was surprise that her son and his friend had gone to the mountains to ski.
                                    A               B                                      C                                     D
6.  Lan was extreme pleased that she got an A for her assignment. 
                        A                     B          C                  D
7.  My friend, whom bicycle was stolen last week, has decided to buy a motorbike
                          A                            B                             C               D