______Р________________________________________________________________________Р________________________________________________________________________РOne possible version:РDear Tom,РCongratulations on your being admitted to Oxford University!РI’m grateful and honored to be invited to your celebration party to be held this Saturday evening.However,much to my regret,I have to decline your kind invitation. As you know, a Chinese petition is being held in our school and I have essfully entered the final petition,which happens to be scheduled on this Saturday and will not end until late into the evening.It’s a great pity that I can’t make it to your party.But I’ve prepared a gift for you and hopefully you willР like it.РMay your party be a great ess and enjoy yourself that day!РYours,РLi Hua