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I don't think I contributed much.

I wonder if I was able to contribute a little.

It seems I was able to contribute.

No further explanation is needed, right? It's mostly as described in the literature.

That's what the ancient texts said, you know.

Sorry, but I'm going back to review the literature and reports.

Because the methods for obtaining the materials and for making them are recorded in the literature.

The player contributed to the victory.

What factor contributed to the reaction?

The mayor acknowledged her services to the city.

His effort contributed to my company's growth.

They will contribute greatly to the growth of the town.

She contributed much to the company.

Japan can thus make a contribution in the fields of culture and education.

He contributed much to the development of the economy.

He made a great contribution to research into cancer.

The robots are sure to contribute to the world.

Specialized libraries collect writings about art.

I count myself lucky to have such a devoted wife.

Those people contributed greatly to world peace.

He made a substantial contribution to economics.

Einstein's theories contributed greatly to modern science.

Science and art must contribute to the promotion of human welfare.

Nobody contributed to the understanding of dreams as much as Freud.

Penicillin has contributed much to the welfare of mankind.

How often do you give blood?

Tom is a regular blood donor.

I donate blood every three months.

I donated blood this afternoon.

I'm uneasy about donating blood.

Please get plenty of sleep the day before donating blood.

Is this the first time you've ever given blood?

Have you ever donated blood?

We gave blood to help the child.

The company gave him a gold watch in acknowledgement of his services.

The summit conference contributed to world peace.

Office managers expect accuracy, efficiency, and dedication.

He devoted the last years of his life to writing his autobiography.

He contributed to the good of the community.

Corporate political donations are coming under heavy scrutiny.

If you turned off your computer right now, you would contribute to the prevention of global warming.

The asterisks mark important references.