用不定式结构改写下列句子!
1.ThefirststudentwhoarrivedatschoolwasTom.
2.Hewastheonlyonethatgotascholarship.
3.ThepersonwhowillteachusEnglishisMissli.
4.I'mnotsurehowIcanfinishthework.
5.Choosingwhatweshalleatisnoteasytoday.