What prepositions will you use to make the sentences complete? 1) Our plan was rejected our... opponents. 2)... my opinion

1) Our plan was rejected by our opponents. 2) In my opinion friendship is the most precious thing in the world. 3) We have always felt a strong affection towards him. We haven\'t changed our attitude towards the boy now. 4) I know from my own experience how difficult it is to establish good relations with your former enemies. 5) The prices have been increased by the government. 6) We were aware of the boy\'s strange behavior. 7) We couldn\'t understand his rejection of the theory. 8) The establishment for a new school created a joyful atmosphere in the local community. 9) The child was rejected by his peers. 10) The remaining half an hour will be spent in doing the sums.