walking on two legs.为什么要用介词ON

walking on two legs.为什么要用介词ON walk on two legs 为什么用这里用on? it can walk ___ two legs .A.on B.with This dog can walk on two legs.改为否定句 waht walks on four legs in the morning,two legs during the day,and three legs in the evening? did it ( )on four legs ( )two legs?深圳版第九册第五课评价手册 What go on four legs in moring ,on two at noon ,and on therr evening What walks on four legs in the morning,two legs during the day,and three llegs in the evening? What walks on four legs in the morning,two lges during the day,and tnree legs in the evening?谜语 What isn it that gose on four legs in the moring,two legs at noon and three legs in the evening? legs,dog,walk,pet,on,can,my,two连词成句 What goes on four legs in the morning,on two at noon,and on three in the evening? What goes on four legs in the morning,on two at noon,and on three in the evening?是什么? What goes on four legs in the morning,on two at noon,and on three in the evening? What goes on four legs in the morning,on two at noon,and on three in the evening 英语翻译A pig has a snout for a nose,small eyes,and a small tail,which may be curly,kinked,or straight.It has a thick body and short legs.There are four toes on each foot,with the two large middle toes used for walking.Pigs are omnivores,which me on his last legs 英语Riddles!1.What walks on four legs in the morning,two legs during the day,and three legs in the evening?2.What is black when it is clean and white when it is dirty?