单句改错
Mary is one of the girls who is always on time.
                                             .
Tom is the only one of the members who are going to be promoted.
                                                          .
What caused the accident was stones on the road.
                                                  .
The singer and dancer are to attend our party.
                                                   .
Interest, as well as prospects, are important when one looks for a job.
                                                                .