Directions (Set of 5 questions): Each sentence below is divided into five parts (I), (II), (III), (IV) and (V). Read each sentence to find out whether there is any grammatical mistake(s) in it. The error, if any, will be in one or more parts of the sentence. As your answer, select the CORRECT parts WITHOUT THE ERROR(S).
I remember my childhood day (I)/ when I used to go (II)/ to the farm with my father (III)/ and was helping him in his work (IV)/ tending to cattle, repaired tractors, cleaning horse stables, etc. (V)