These three things contribute to the solution of a criminal case.

Several things have contributed to the blue and orange tide.

It turned out that all these things contributed to his getting through school.

Living things also contribute to the silicate cycle near the Earth's surface.

Certain things, including age, illness, and genetics, may contribute to hearing loss.

Of course, many things may contribute to sleep problems.

Felix had not, to his knowledge, contributed a thing.

Both these things contribute to a coherent policy on asylum.

You can't deny that these things have contributed to our growth.

Reading books, studying history-all these things contribute to making us better citizens, too.