What has hands but no feet ,a face but no eyes,tell but no talk/

题目

What has hands but no feet ,a face but no eyes,tell but no talk/
What is black when it is clean and white when it is dirty?
what does everybody do at the same time?
how long should you legs be?
what has four legs and a back but can't walk?

答案

clock闹钟
blackboard黑板
breathe呼吸
can support you 能支撑你（这个不确定）
chair/desk桌子或椅子
如还有不懂的,还可以继续追问哦\(^o^)/~