DearProf.Wong,
IamdeeplysorrytoinformyouthatIdidnotmanagetocompletethetaskyoudesignatedlastweek,duetoasuddenillnessfallinguponmethesedays.Forthelastweek,Ihavebeeninahospitalwithacontinuousfever,whichhaspreventedmefromanyactivity.
Tomakeupmyfault,couldyoupleaseextendmydeadlinetonextFriday?Ifso,IpromiseIwillfinishthetaskandsendmyreporttoyouviaemail.
Idoapologizeagainforanyinconvenienceitmightbringtoyou,andhopeyoucouldacceptmyapology.
Sincerelyyours,
LiMing