1. contributed
Penicillin has contributed much to the welfare of mankind.
He contributed a lot of money.
Those people contributed greatly to world peace.
Nobody contributed to the understanding of dreams as much as Freud.
A power failure contributed to the confusion in the hall.
Einstein's theories contributed greatly to modern science.
Nobody knew that Tom was the person who contributed most of the money.
A generous man contributed some two billion yen to charity.
His effort contributed to success.
He studied hard in his youth, and it contributed to his success in later years.
An illiterate man was fair game for the literate exploiters who contributed to his domination.
He contributed much money of his own accord.
And his strategy regarding the British economy may have actually contributed to a period of economic crisis known as the Great Depression.
The students contributed their own time to the project
Her studies contributed greatly to developing scientific research.