猜猜：I am something that can run but can not walk .What am I?

猜猜：I am something that can run but can not walk .What am I? am i messing something I am 20 something是什么意思? I'am going do something I am tired.I am thinking of ( )something else Am i missing something什么意思 i am reading something丶是什么意思? who am I 和 who I am既然猜猜我是谁是guess who I am,那么我是谁是who I am还是who am I.为什么? it i k yo wil be th f.i.r 谁能帮我猜猜是什么意思 可能是哪个单词是缩写 I feel very bad.Something I am not I am e___.Could I have something to drink? I want something to drink because I am t__________ I would like something _______.I am very thirsty. i am a little _______.i need something to eat I am on the 20th page of the book I am readingso far I. 猜猜我是谁 用英语怎么说是 Guess who I am还是Guess who am I谢谢 猜猜我是谁用英文是“WHO IS ME”还是“WHO AM I”? When I eat,Ilive,but when I drink ,I die.What am I 猜猜谜语．快点．