Sentence Improvement

DIRECTIONS : In each question, a part of sentence is printed italics. Below each sentence, some phrases are given which can substtute the italicised part of the sentence.
21. The members attending the meeting were men on powerful positions, high in the councils of their respective governments.
  A.  of
  B.  in
  C.  with
  D.  no correction required
22 He was born to rich parents.
  A.  from
  B.  with
  C.  by
  D.  of

23. No one needs to worry about me.
  A.  will worry
  B.  shall worry
  C.  need worry
  D.  no improvement
24. Mother always finds faults with the maid servant.
  A.  finds fault
  B.  find faults
  C.  is finding faults
  D.  no improvement
25. I have not written any letter to him since my father had died.
  A.  was dead
  B.  died
  C.  has died
  D.  no improvement