Täydennä sopivalla prepositiolla.

I took part a conference last summer. I had to talk children’s rights (edessä) hundreds of people.
Earlier that year I had travelled (Bangladeshiin) Bangladesh to visit children living in labour camps and the streets. The audience
listened me in silence when I told them that the children often
have to pay more (maksaa jostakin) their food and accommodation than they earn. The children in developing countries can’t fight
their rights themselves. That’s why the rest of us have to help them.
the end of the conference week my organisation had received
more than 100,000 euros in donations (osallistujilta) the participants of the conference.