Onceaday.WhenIwasgoingtotakeasubway,Isawanadvertisement,thereisanemptyAfricangrassland,afemaleelephantandherson.Thelittleelephantsaidhappily"Mom,myteethstartedtogrowup!"Thefemaleelephantsaidnothing.Thelittleelephantsaidagain"Mom,myteethstartedtogrowup!"Thefemaleelephantstillsaidnothing.Theelephantshouted"Aren'tyouproudofme?"Afterseeingthisadvertisement,Ifeelsad.Elephantsshouldhaveteeth,andit'sworthbeinghappyforitsmother.Butatthesametime.Itmeansdangeroustothelittleelephant.Everyyear,humanskillelephantstomaketheartifactswhichmadebyivory.Andthefemaleelephantkeepssilent,meanstobeworriedaboutherson.Ihope(that)thisadvertisementcanmakehumanstrytoprotecttheelephants!