verb
BAD : Oxfam and Save the Children have contributed a lot of money for the relief work.
GOOD : Oxfam and Save the Children have contributed a lot of money to the relief work.
BAD : When I return home, I hope to contribute my country's economic development.
GOOD : When I return home, I hope to contribute to my country's economic development.
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contribute (money or some other form of assistance) to sth : 'In recent years a number of major corporations have contributed large sums of money to the President's campaign funds.'