my friends encouraged me to be brave when i met difficulties（改为被动语态）
2.someone will find out the flight time on the internet（改为被动语态） 3.who will be chosen to attend the meeting by the company(改为主动语态) 4.nobody was invited to Diana's party by her(改为主动语态)
5.the smell of his old book really gets to me after a while(译成中文)