Q. Read the following passage. Each line contains an error. Find the error and write the correct word in the space provided.
                                                                       Incorrect                          Correct
Throughout the ages, birds has   e.g.               has                                    have

been the source of wonder                   (a) __________                   ______________

 to all that have observed their             (b) __________                   ______________

flight or listened to its sweet songs.      (c) __________                   ______________ 

As a group, birds were unique.             (d) __________                   ______________

They are a only animals                       (e) __________                   ______________

covered by colourful feathers              (f) __________                   ______________