Possible version1：
Last Friday，I rode my bike home．Unfortunately，I knocked down an old man who wasalso riding a bike．The old man couldn't stand up．There must be somethingwrong with his leg，so I called my mom immediately．We took the old man to thehospital at once．The doctor gave him a careful examination．Luckily，there wasnothing serious．We were all relieved．
ThenI went to have his bike repaired．The old man took his bike and we waved eachother goodbye．
Theaccident taught me a lesson：when riding a bike we should be more careful．
（99words）
Possible version2：
Last Friday，as usual I rode my bikehome．But at a crossing，I accidentally knocked an old man off his bike．Ihurried over and found his leg was injured．Nervous and worried，I called mymom and told her what had happened．We decided to take him to the hospitalfirst．
Soon after we arrived at thehospital，my mother came．The doctor gave the old man a thorough examination．To our delight and relief，there was nothing seriously wrong with him．Wethanked the doctor and left．
After that，we went back to wherethe bike was parked only to find it didn't work．So I immediately found arepairman to get it fixed．Before the old man left，my mom offered him our cellphone number in case he needed to contact us．Then the old man got on his bikeand we waved goodbye to eachother．
The accident made me realize thatin the first place we should be careful to avoid accidents，but once they occur，we should take responsibility．
（174 words） Possible version1：
Last Friday，I rode my bike home．Unfortunately，I knocked down an old man who wasalso riding a bike．The old man couldn't stand up．There must be somethingwrong with his leg，so I called my mom immediately．We took the old man to thehospital at once．The doctor gave him a careful examination．Luckily，there wasnothing serious．We were all relieved．
ThenI went to have his bike repaired．The old man took his bike and we waved eachother goodbye．
Theaccident taught me a lesson：when riding a bike we should be more careful．
（99words）
Possible version2：
Last Friday，as usual I rode my bikehome．But at a crossing，I accidentally knocked an old man off his bike．Ihurried over and found his leg was injured．Nervous and worried，I called mymom and told her what had happened．We decided to take him to the hospitalfirst．
Soon after we arrived at thehospital，my mother came．The doctor gave the old man a thorough examination．To our delight and relief，there was nothing seriously wrong with him．Wethanked the doctor and left．
After that，we went back to wherethe bike was parked only to find it didn't work．So I immediately found arepairman to get it fixed．Before the old man left，my mom offered him our cellphone number in case he needed to contact us．Then the old man got on his bikeand we waved goodbye to eachother．
The accident made me realize thatin the first place we should be careful to avoid accidents，but once they occur，we should take responsibility．
（174 words）