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.
41. They are working for the upliftment of their village.
  A.  uplift of
  B.  Uplifting
  C.  uplifting of
  D.  no improvement
42. On seeing the lion she felt too much afraid.
  A.  much
  B.  excessively
  C.  very much
  D.  no improvement

43. The police are trying to solve the mystery.
  A.  was
  B.  has been
  C.  is
  D.  no improvement
44. Suganya was really happy while I accepted her invitation for her birthday party.
  A.  as
  B.  when
  C.  after
  D.  no improvement
45. People are tiring very soon in an activity which they don't like.
  A.  trying
  B.  tyring
  C.  tired
  D.  no improvement