The alphabet
There is no such word in English.
has contributed significantly
How one culture contributed to modern science
It shows you what was contributed to the question, and who contributed.
Contributed means 'helped' - 'made some contribution to'.
they have contributed by helping the US grow
Your Mother contributed to my geometry :D
Most ancient civilizations have contributed to the development of science & technology.Chinese,Indian,Egyptian civilizations have contributed largely.
Americans and africans have contributed a big society.
Mr. Bell invented and contributed the telephone. Thanks for looking at my answer!!
The couple contributed several thousand dollars to Haiti relief efforts. Living in a smoke-filled home contributed significantly to my daughter's asthma. His findings have contributed much to the field of cancer research.
The latter one is the correct sentence by structure. The correct one is, he contributed in organizing the program.