Change the sentences into passive where it is possible 1)They haven039;t

Change the sentences into passive where it is possible 1)They haven't paid for their new house yet. 2)My mother gave each child a farewell present. 3)The Prime Minister will sign the document tomorrow. 4)We knew that we could rely on our friend 5)We wondered who had inherited the wonderful old library. 6)The leaders of the party appealed to its members. 7)They remained at school till about six oclock. 8)Unfortunately, they are rejecting all the offers. 9)They southern part of the country contrasts sharply with the northern area. 10)I hope that scientists will soon find an effective treatment for cancer. 11)They are widely discussing the incident in the newspapers. 12)The change in the climate has affected the agriculture. 13)At that time they were establishing friendly relations between our countries. 14)When we arrived, they had already discussed all the options.