Choose the word or phrase that need correcting

Choose the word or phrase that need correcting.
     1.  My sister has done her homework in her room for a quarter past eight.
                            A               B                     C                   D
     2.  Wouldyou mind to open the window forme?
            A      B             C                       D
     3.  Mary enjoys to be able to meet a lotof interesting people during her vacation.
                             A                     B         C                   D
     4.  It has been along time since we last talked together, isn’t it?
                            A            B               C                  D
     5.  Traffic jam has the mostserious problem, isn’t it?
                          A        B      C                   D