what is biack when it is ciean and white when it is dirty?(翻译意思）

What is biack when it is clean and white when it is dirty? what is biack when it is ciean and white when it is dirty?(翻译意思） 英语谜语：when I am white,I am dirty.when I am biack,I am ciean.what am 猜谜语：What a room has no walls,no windows,and no floors?it还有：What is biack when it is clean white when it is dirty?it不许乱回答,不然连一根毛也不给你 It is biack and Which is biack when you buy it,red when you use it,and gray when you throw it away Which is biack when you buy it,red when you use it,and gray when you throw it away this is my friend.__name's Jim.__is English.-----Is___in Class -----Yes,and___name is Anne.What's___name?Are____eleven?I have a cat.___name is Mimi.____is white and biack.I like___very muchi.(it) 英语谜语答案1.letter is an insect?2.What is biack when it is clean and white when it is dirty?3.What will you get if you cut the head of a bear?4.why is a river rich? When you like me,I say that what is what,when yo biack BIACK, biack I get to know what is loneliness when missing you. I have a biack .a bike is in my room这句话有什么错误 My family name is biack 汉语意思 I have a lovely biack cat.翻译 I don't know what I should do when there is a fire同义句