DearMr.X:

　　Hello!

　　I'msorrythatIdidmanywrongthingsinthesetwomonth.

　　Incomputerclass,Iplayedcomputergames.Inartclass,Ididn'tdrawanything,butonlyreadbooks.Inmusicclass,Iplayedpianoloudlyandsingquietly.Sometimes,Italkedquietlyintheclass.

　　Isometimesdidmyhomeworkinclass.Ialwaysraninthecorridorwithmyfriends.Thatwasdangerous.Iwillnotdothesefromtoday.

　　IknowIwaswrong.Iwillneverdothesefromnowon.Iwilllistentoteacherscarefullyinclass.Iwanttobeagoodstudent.Ireallyhopeteachersandclassmatescanbelieveme.

　　YourStudent,

　　Cindy