Перепишите предложения, выбрав из скобок требующуюся форму причас¬тия.

Yesterday we were at a conference (organizing, organized) by the pupils of the 10th form.
(Taking, taken) the girl by the hand, she led her across the street.
It was not easy to find the (losing, lost) stamp.
I shall show you a picture (painting, painted) by Hogarth.