It is the experience he had as a boy ______ has formed his present personality.

   A. that                           B. who                C. which                    D. when

It is the experience he had as a boy ______ has formed his present personality.

It is the experience he had as a boy ______ has formed his present personality.

1. A.
   that
2. B.
   what
3. C.
   which
4. D.
   who

 It is the experience he had as a boy ______ has formed his present personality.

   A. that                           B. what                      C. which                    D. who

It is the experience he had as a boy ______ has formed his present personality.

   A. that                           B. who                C. which                    D. when