猜一猜下面的谜语

1.What kind of dog doesn't bite or bark？
2.What a room has no walls,no doors,no windows,and no floors？
3.What has hands but no feet,a face but no eyes,tells but not talk？
4.What is black when it is clean and white whenit is dirty？

猜下面的谜语 请猜下面的谜语? 下面的谜语各打一成语 有雅兴的朋友，猜一猜下面的谜语 下面的谜语谁知道答案请告诉我。 谁能帮我解开下面的谜语？ 猜一下下面的谜语啊 猜下面的谜语是八个字。 帮我猜出下面的谜语 谁能写出下面词的谜语？